Fisika MAN 1 Pekanbaru

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10 Fisikawan Terhebat Sepanjang Masa

Berdasarkan hasil polling Majalah Fisika Dunia di tahun 1999, terdapat 10 orang fisikawan yang terhebat dan mengubah fisika serta dunia. Dari para tokoh-tokoh tersebut melalui teori yang ditemukannya, dunia telah berubah drastis. Dari peralatan kapak, kendaraan kuda, komunikasi merpati, hingga pesawat terbang, ponsel, notebook, kamera dan masih banyak lagi.

Berikut 10 Fisikawan terhebat sepanjang sejarah:

Albert Einstein : Mekanikan Quantum : General Relativity, Fotolistrik, “bom atom” E=mc2
Isaac Newton : Mekanika Klasik : Hukum Newton, Gravitasi, Cahaya
James Clerk Maxwell : relasi listrik-magnet (Gauss, Faraday, Bio-Savart dan Ampere)
Niels Bohr : Atom Bohr (fisika klasik –> fisika quantum)
Werner Heisenberg : Ketidakpastian
Galileo Galilei : Pendobrak Doktrin Agama vs Saintis
Richard Feynman : Elektrodinamika Quantum
Paul Dirac : Statistik Fermi-Dirac, Relativitas khusus X Relativitas Umum
Erwin Schrodinger : Fungsi persamaan gelombang mekanikan kuantum
Ernest Rutherford : Teori atom (proton, elektron, neutron), fisika inti

Tentu saja, ada ilmuwan lain yang terkenal seperti Landau (Russia) yang tidak masuk dalam 10 besar, mungkin karena masalah ideologis.

About School

IMAGINE A SCHOOL WHERE KIDS HAVE FREEDOM TO BE THEMSELVES-WHERE SUCCESS IS NOT DEFINED BY ACADEMIC ACHIEVEMENT BUT BY THE CHILD'S OWN DEFINITON OF SUCCESS-WHERE THE WHOLE SCHOOL DEALS DEMOCRATICALLY WITH ISSUES, WITH EACH INDIVIDUAL HAVING AN EQUAL RIGHT TO BE HEARD-YOU CAN PLAY ALL DAY IF YOU WANT TO AND THERE IS TIME AND SPACE TO SIT AND DREAM ^^

Golden words

"Everybody is a GENIUS. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is STUPID."

By Albert Einstein

Solusi Pendidikan Seks Lewat Mata Pelajaran IPA

Pro kontra pentingnya pendidikan seks di sekolah barangkali bisa diatasi dengan pendekatan pelajaran sekolah itu sendiri. Sebab interaksi antara murid dan guru cukup intens dan mata pelajaran seperti IPA Biologi adalah satu-satunya media yang tepat.

Pagi itu giliran saya untuk melakukan tutorial pembelajaran IPA bagi anak-anak setara SMP di salah satu sekolah non formal. Kebanyakan warga belajar di sekolah non formal adalah anak-anak putus sekolah. Sehingga usianya beragam ada yang di atas 17 tahun ada yang masih seusia 15 tahun.

Dalam tutorial itu saya kebagian menjelaskan tentang bab perkembangan biakan makhluk hidup pada manusia. Dalam buku teks yang saya baca, ternyata perkembangan manusia dijelaskan secara rinci disertai gambar-gambar bagian dalam alat-alat reproduksi manusia, dan bagaimana proses terjadi zigot (bahan dasar perkembangan manusia).

Seperti yang pembaca sudah ketahui, bagaimana rahim itu memiliki anatominya, di mana terjadinya percampuran antara testis dan ovum, lalu apa yang terjadi setelah sperma laki-laki masuk ke dalam indung telur wanita. Berapa banyak sperma yang diterima dan selanjutnya kenapa terjadi kehamilan, dan menstruasi.

Semua saya jelaskan apa adanya sesuai dengan buku ajar yang disediakan. Kebetulan buku-buku yang saya jadikan rujukan adalah BSE (Buku sekolah elektronik) yang saya dapatkan dari bse.kemendiknas.go.id.

Karena sifatnya penjelasan gambar, maka dalam setiap mengajar saya gunakan infokus sehingga perhatian murid betul-betul dari buku yang saya sorot lewat infokus. Ditambah dengan animasi dan berbagai macam gambar pendukung.

Pendeknya, semua yang saya lakukan itu menurutku, merupakan pendidikan seks yang bagus lewat mata pelajaran. Dengan mata pelajaran ini, guru bisa berinteraksi dengan murid, mempertanyakan dan menjadi peluang untuk menjelaskan bagaimana seharusnya seorang murid yang kebanyakan sudah memasuki usia akil baligh itu agar menjaga kesehatan alat-alat reproduksinya.

Melihat paparan yang saya sampaikan itu, para murid merasakan sesuatu yang baru dan di antara mereka terkesan risih dan canggung dan pada gilirannya ada murid yang “nyeletuk”

“Pak Jangan bahas ini dong, saya jadi jijik?”

Respon pertama ini cukup menarik, saya berasumsi kalau anak ini belum pernah mendapatkan penjelasan tentang alat-alat reproduksi. Pada bagian evaluasi, saya bertanya kepada para murid, “Anak-anak jadi di manakah proses pembentukan atau produksi sperma bagi laki-laki?”

Dan jawaban yang mengagetkan terlontar dari satu anak yang usianya sekitar 20 tahun,

“Tempatnya di dengkul pak, sebab kalau kebanyakan keluar sperma, denkulnya bisa keropos!” Jawaban anak ini, sepertinya tidak ada pengaruh dari penjelasan panjang lebar yang saya paparkan. Ini membuktikan bahwa paham dari luar lebih mendominasi anak remaja dalam masalah seks. Karenanya, pendekatan pembelajaran lewat mata pelajaran ini tidak bisa hanya sekilas dan membutuhkan interksi yang lebih intens lagi.

Begitulah sesi pengajaran biologi yang paling menarik, sekaligus merupakan ajang yang tepat sebagai wahana pendidikan seks bagi anak sekolah yang kebanyakan masih terlalu awam dalam menyerap informasi seputar seks. Sebab tidak sedikit anak remaja tanggung ini mendapatkan informasi dari teman-temannya yang seusianya.

Pendekatan Agama bagaimana?

Pengalaman saya, saat di pondok ada pelajaran masalah yang berhubungan dengan ini lewat bab-bab fiqh dasar. Misalnya, menjaga kebersihan, mengenal jenis-jenis air untuk bersuci, dan seputar menstruasi apa dan bagaimana yang harus dan tidak boleh dilakukan. Lebih fokus lagi, bagaimana cara mencuci alat kemaluan bagi laki-laki dan perempuan.

Dari pendekatan fiqh (how to) itulah yang tertulis dalam buku-buku karangan ulama terdahulu.

Adapun pendekatan agama yang lain guna mencegah penyimpangan seksual tidak terkait dengan masalah fiqh, tetapi lebih kepada keimanan yang intensif. Inilah yang bisa mencegah terhadap hal-hal yang bisa mengurangi dampak penyiimpangan seksual di luar koridor.

By Anonim

Benyamin Franklin Biography

Benjamin Franklin was a scientist, ambassador, philosopher, statesmen, writer, businessman and celebrated free thinker and wit. He has often been referred to as 'America's renaissance man' and was emblematic of the fledgling American nation.

Benjamin Franklin was born January 17, 1706 into a large and poor family. His father had 17 children by 2 different wives. Benjamin was brought up in the family business of candle making and his brother's printing shop. Whenever he could Benjamin would take the opportunity to read and learn about a wide range of subjects, from Sophocles to modern science. Whilst co workers would take a leisurely lunch break, Benjamin Franklin would pour over books from the bookshop munching on some raisins.

At an early age, he also started writing articles which were published in the New England Coureant under a pseudonym; Franklin wrote under pseudonym's throughout his life. After several were published, he admitted to his father that he had wrote them. Rather than being pleased his father beat him for his impudence. Therefore, aged 17, the young Benjamin left the family business and travelled to Philadelphia.

In Philadelphia, Benjamin's reputation as an acerbic man of letters grew. His writings were both humorous and satirical, but they also raised the fears of the Pennsylvania governor, William Keith. William Keith was fearful of Benjamin's talents so offered him a job in England with all expenses paid. Benjamin took the offer, but once in England the governor deserted Franklin, leaving him with no funds.

Benjamin Franklin frequently found himself in awkward situations, but his natural resourcefulness and determination always overcame difficult odds. Benjamin found a job at a printers in London. Here he was known as the "Water American" - as he preferred to drink water rather than the usual 6 pints of beer daily. Franklin remarked there was 'more nourishment in a pennyworth of bread than in a quart of beer.

In 1726, a Quaker Merchant, Mr Denham offered him a position in Philadelphia. Franklin accepted and sailed back to the US.

On his journey home, Benjamin wrote a list of 13 virtues he thought important for his future life. Amongst these were temperance, frugality, sincerity, justice and tranquility. He originally had 12, but, since a friend remarked he had great pride, he added a 13th - humility (Imitate Jesus and Socrates)

Virtues of Benjamin Franklin

1. "TEMPERANCE. Eat not to dullness; drink not to elevation."
2. "SILENCE. Speak not but what may benefit others or yourself; avoid trifling conversation."
3. "ORDER. Let all your things have their places; let each part of your business have its time."
4. "RESOLUTION. Resolve to perform what you ought; perform without fail what you resolve."
5. "FRUGALITY. Make no expense but to do good to others or yourself; i.e., waste nothing."
6. "INDUSTRY. Lose no time; be always employ'd in something useful; cut off all unnecessary actions."
7. "SINCERITY. Use no hurtful deceit; think innocently and justly, and, if you speak, speak accordingly."
8. "JUSTICE. Wrong none by doing injuries, or omitting the benefits that are your duty."
9. "MODERATION. Avoid extremes; forbear resenting injuries so much as you think they deserve."
10. "CLEANLINESS. Tolerate no uncleanliness in body, cloaths, or habitation."
11. "TRANQUILLITY. Be not disturbed at trifles, or at accidents common or unavoidable."
12. "CHASTITY. Rarely use venery but for health or offspring, never to dullness, weakness, or the injury of your own or another's peace or reputation."
13. "HUMILITY. Imitate Jesus and Socrates."

Franklin sought to cultivate these virtues throughout the remainder of life. His approach to self improvement lasted throughout his life.

Back in America, Franklin had many successful endeavours in business, jounalism, science and statesman ship.

Scientific Achievements of Benjamin Franklin

Science experiments were a hobby of Franklin. This led to the:

Franklin stove - a mechanism for distributing heat throughout a room.
The famous kite and key in the thunderstorm. This proved that lightening and electricity were one and the same thing.
He was the first person to give electricity positive and negative charges
The first flexible urinary catheter
Glass harmonica
Bifocal glasses.

Franklin never patented his inventions, preferring to offer them freely for the benefit of society. As he wrote:

"... as we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours; and this we should do freely and generously."

Benjamin Franklin as Ambassador

Franlkin was chosen as an ambassador to England in the dispute over taxes. For five years he held conferences with political leaders as well as continuing his scientific experiments and musical studies. Later on Franklin played a key role in warning the British government over the dangers of taxing the American colonies. In a contest of wills, Franklin was instrumental in encouraging the British Parliament to revoke the hated Stamp Act. However, this reversal was to be short lived. And when further taxes were issued, Franklin declared himself a supporter of the new American independence movement.

In 1775, he returned to America in conflict. He was one of the five representatives chosen to draw up the American declaration of Independence with Thomas Jefferson as author.

Franklin was chosen to be America's ambassador to France, were he worked hard to gain the support of the French in America's war effort. During his time in French society, Franklin was widely admired, and his portrait hung in many houses.

At the age of 75, the newly formed US government beseeched Franklin to be America's representative in signing a peace treaty with Great Britain which was signed in 1783.

He was finally replaced as French ambassador by Thomas Jefferson, who paid tribute to his enormous capacity Jefferson remarked " I succeed him; no one can replace him."

Religious Beliefs of Benjamin Franklin

Benjamin Franklin believed in God throughout his life. In his early life he professed a belief in Deism. However, he never gave too much importance to to organised religion. He was well known for his religious tolerance, and it was remarked how people from different religions could think of him as one of them. As John Adams remarked:

"The Catholics thought him almost a Catholic. The Church of England claimed him as one of them. The Presbyterians thought him half a Presbyterian, and the Friends believed him a wet Quaker."

Franklin embodied the spirit of the enlightenment and spirituality over organised religion.

Franklin was a keen debater, but his style was to avoid confrontation and condemnation. He would prefer to argue topics through the asking of awkward questions, not dissimilar to the Greek philosopher Socrates.

Newton's Biography

Early Life of Newton

Sir Isaac Newton was born on Christmas Day, in 1643, to a relatively poor farming family. His father died 3 months before he was born. His mother later remarried, but her second husband did not get on with Isaac; leading to friction between Isaac and his parents. The young Isaac attended school at King’s School, Grantham in Lincolnshire (where his signature is still inscribed in the walls.. Isaac was one of the top students, but before completing his studies his mother withdrew him from school, so Isaac could work as a farmer. It was only through the intervention of the headmaster that Isaac was able to return to finish his studies; he passed his final exams with very good results, and was able to go to Trinity College, Cambridge.

Newton at Cambridge

At Cambridge he was able to pursue his interests in mathematics, science and physics. At the time the prevailing education was based on Aristotle, but Isaac was more interested in modern mathematicians such as Descartes. Isaac Newton had a prodigious capacity to consider mathematical problems, and then focus on them until he had solved the mystery behind them. His one pointed nature led him to, at times, be detached from the world. For example, he had little time for women. An early teenage romance came to nothing, and he remained single throughout his life.

Sir Isaac Newton, has been referred to as one of the greatest genius’ of history. His mathematical and scientific achievements give credence to such a view. Amongst his many accomplishments in the field of science include:

Developing a theory of Calculus. Unfortunately, at the same time as Newton, calculus was being developed by Leibinz. When Leibinz published his results, there was a bitter feud between the two men, with Newton claiming plagiarism. This bitter feud lasted until Leibinz death in 1713, it also extended between British mathematicians and the continent.

Mathematical Achievements of Newton

generalized binomial theorem
Newton's identities,
Newton's method,
classified cubic plane curves (polynomials of degree three in two variables),
Substantial contributions to the theory of finite differences,
Use of fractional indices
Used geometry to derive solutions to Diophantine equations.
Used power series with confidence and to revert power series.
Discovered a new formula for pi.

Scientific Achievements of Newton

Optics – Newton made great advancements into the study of optics. In particular he developed the spectrum by splitting white light through a prism.
Telescope – Made significant improvements to the development of the telescope. However, when his ideas were criticised by Hooke, Newton withdrew from the public debate. He developed an antagonistic and hostile attitude to Hooke, throughout his life.
Mechanics and Gravitation. In his famous book Principa Mathematic. Newton explained the three laws of motion that laid the framework for modern physics. This involved explaining planetary movements.

Newton Hit on the Head with an Apple.

The most popular ante dote about Sir Isaac Newton is the story of how the theory of gravitation came to him, after being hit on the head with a falling apple. In reality, Newton and his friends may have exaggerated this story. Nevertheless, it is quite likely that seeing apples fall from trees may have influenced his theories of gravity.

Newton’s Religious Belief's

As well as being a scientist, Newton actually spent more time investigating religious issues. He read the Bible daily, believing it to be the word of God. Nevertheless, he was not satisfied with the Christian interpretations of the Bible. For example, he rejected the philosophy of the Holy Trinity, his beliefs were closer to the Christian beliefs in Arainism (basically there was a difference between Jesus Christ and God)

Newton - Bible Code

Newton was fascinated with the early Church and also the last chapter of the Bible Revelations. He spent many hours poring over the Bible, trying to find the secret Bible Code. He was rumoured to be a Rosicrucian. However, the religious belief’s that Newton held could have caused serious embarrassment at the time. Because of this he kept his views hidden, almost to the point of obsession. This desire for secrecy seemed to be part of his nature. It was only on his death that his papers were opened up. The bishop who first opened Newton’s box, actually found them too shocking for public release, therefore, they were kept closed for many more years.

Newton and Alchemy

Newton was also interested in alchemy. He experimented on many objects, using a lot of Mercury. Very high levels of mercury in his blood stream may have contributed to his early death and irregularities in later life.

Newton was made member of the Royal Society in 1703. He was also given the job of Master of Mint in 1717. He took this job seriously and unofficially was responsible for moving England from the silver standard to the gold standard.

Newton was an extraordinary polymath; the universe simply fascinated him. He sought to discover the hidden and outer mysteries of life. With his sharp intellect and powers of concentration, he was able to contribute to tremendous developments in many areas of science. He was a unique individual. John Maynard Keynes, a twentieth century genius, said of Newton:

“I do not think that any one who has pored over the contents of that box which he packed up when he finally left Cambridge in 1696 and which, though partly dispersed, have come down to us, can see him like that. Newton was not the first of the age of reason. He was the last of the magicians, the last of the Babylonians and Sumerians, the last great mind which looked out on the visible and intellectual world with the same eyes as those who began to build our intellectual inheritance rather less than 10,000 years ago. Isaac Newton, a posthumous child born with no father on Christmas Day, 1642, was the last wonderchild to whom the Magi could do sincere and appropriate homage.

Galileo Galilei Biography

Galileo Galilei - Astronomer and Scientist 1564-1642 Galileo was born in Florence, Italy in 1564 to a poor but noble family. His parents recognised their child's innate intelligence and talents and so made sacrifices to have him educated. At his father's insistence, Galileo studied the profitable career of medicine. At the University of Pisa, Galileo became fascinated in a wide range of subjects. He was also critical of many of Aristotle's teaching which had dominated education for the past 2,000 years.

Galileo was appointed to be a mathematics professor at the university of Pisa, but, his strident criticisms of Aristotle, left him isolated amongst his contempories. After 3 years of persecution, he resigned and went to the university of Padua. Here he taught maths. His entertaining lectures attracted a large following and he was able to spend the next 18 years pursuing his interests in astronomy and mechanics.

During this time, Galileo made important discoveries about gravity, inertia and also developed the forerunner of the thermometer. Galileo also worked tirelessly on the science of gnomonics (telling time by shadows) and the laws of motion.

It was in astronomy that Galileo that became famous and also courted the opposition of the Holy Roman Catholic Church.

Galileo came to the same conclusions of Copernicus that the sun was the centre of the universe and not the earth. By inventing the world's first telescope, Galileo was able to make many explorations of the universe. He found that

Saturn had a beautiful ring of clouds.
The moon was not flat but had mountains and craters.
Jupiter had many moons which revolved around Jupiter rather than directly the sun.

Thus, Galileo not only had the mathematical proofs of Copernicus, but, also new proof from the science of astronomy. However, Galileo knew that publishing these studies would bring the disapproval of the church authorities. The Church had already started to forbid the teachings of his teachings, especially anything that supported Copernicus.However, in 1623, a new pope, Pope Urban VIII seemed to be more liberally minded and he allowed Galileo to publish his great works on astronomy and supporting the works of Copernicus.

However, after publication, elements within the Church sought to attack Galileo's position. Thus, Galileo was arrested and imprisoned for several months. He was convicted of heresy and was forced to recant his beliefs. He spent the remaining years of his life under house arrest at Arceti.

Galileo had three children. He was especially close to one of his daughters, Polissena; she took the name of Sister Maria Celeste and entered a convent near Arceti. Despite being censured by the church, Galileo continued to make discoveries until death overtook him in 1642. He was blind by the time he passed away. Galileo made many important contributions to the development of scienc.

Muhammad Biography

Muhammad also spelled Mohammed or Muhammad) (ca. 570 Mecca – June 8, 632 Medina),is the central human figure of the religion of Islam and is regarded by Muslims as the messenger and prophet of God, the last and the greatest law-bearer in a series of prophets of Islam.

Muslims consider him the restorer of the uncorrupted original monotheistic faith (islam) of Adam, Abraham, Moses, Noah, Jesus (Isa) and other prophets of Islam. He was also active as a diplomat, merchant, philosopher, orator, legislator, reformer, military general, and, for Muslims and followers of several other religions, an agent of divine action.

Born in 570 CE in the Arabian city of Mecca, he was orphaned at a young age and was brought up under the care of his uncle. He later worked mostly as a merchant, as well as a shepherd, and was first married by age 25. Discontented with life in Mecca, he retreated to a cave in the surrounding mountains for meditation and reflection. According to Islamic beliefs it was here, at age 40, in the month of Ramadan, where he received his first revelation from God. Three years after this event Muhammad started preaching these revelations publicly, proclaiming that "God is One", that complete "surrender" to Him (lit. islam) is the only way acceptable to God, and that he himself was a prophet and messenger of God, in the same vein as Adam, Noah, Abraham, Moses, David, Jesus and other prophets in Islam.

Muhammad gained few followers early on, and was met with hostility from some tribes of Mecca; he was treated harshly and so were his followers. To escape persecution Muhammad and his followers migrated to Medina (then known as Yathrib) in the year 622 CE. This event, the Hijra, marks the beginning of the Islamic calendar. In Medina, Muhammad managed to unite the conflicting tribes, and after eight years of fighting with the Meccan tribes, his followers, who by then had grown to ten thousand, conquered Mecca. In 632 a few months after returning to Medina from his Farewell pilgrimage, Muhammad fell ill and died. By the time of his death most of the Arabian Peninsula had converted to Islam and he united the tribes of Arabia into a singular Muslim religious polity.

The revelations (or Ayats, lit. "Signs of God"), which Muhammad reported receiving until his death, form the verses of the Qu'ran, regarded by Muslims as the “word of God”, around which his religion is based. Besides the Qu'ran, Muhammad’s life (sierra) and traditions (sunnah) are also upheld by Muslims. They discuss Muhammad and other prophets of Islam with reverence, adding the phrase peace be upon him whenever their names are mentioned. While conceptions of Muhammad in medieval Christendom and pre modern times were largely negative, appraisals in modern times have been far less so. Besides this, his life and deeds have been debated by followers and opponents over the centuries.

Wanita perkasa

Jika dihitung kilogram demi kilogram, massa tubuh lansing seorang wanita sekuat pria.

Benar atau salah ??

Muatan listrik negatif Bumi

Mengapa permukaan Bumi bermuatan listrik negatif ????

Bola basket

Mengapa putaran balik (backspin) menjadi sangat penting dalam melakukan tembakan dalam permainan bola basket ?? Semua pemain mempraktekkan tembakan dari ujung jari dengan sedikit mengibaskan pergelangan tangan untuk melakukan backspin pada bola secara otomatis.

Kutu meloncat

Kutu bisa meloncat sampai ketinggian 33 cm, lebih dari 1 kaki, atau seratus kali panjangnya sendiri dengan membangun percepatan 140 g. Jika seseorang bisa melakukan hal yang sama sebanding dengan tinggi tubuhnya, orang tersebut bisa melompat setinggi gedung bertingkat 50.

Mengapa kita tidak bisa ???

Tikus yang terangkat

Baru-baru ini ada suatu peristiwa terangkatnya seekor tikus di sebuah medan magnet. Fisika apakah yang terjadi disini ??

0,5 Persen saja

Delapan puluh persen masalah sebenarnya bersifat sepele, 19,5 persen tak terpecahkan dan seorang jenius dituntut untuk mencapai dan memecahkan 0,5 persen sisanya. By Hermann Bondi

Bernyanyi di kamar mandi

Di kamar mandi, bahkan penyanyi yang bersuara jelek sekalipun akan terdengar indah.

Apa pendapatmu tentang transformasi ini ?

Mendengarkan suara sendiri

Kebanyakan kita menyatakan bahwa hasil rekaman suara kita berbeda dengan suara asli kita.Apakah kita adalah korban sebuah ilusi ataukah perbedaan itu benar-benar nyata ??

Badai di dalam cangkir teh

Aduk segelas air teh yang masih ada rempahnya, maka sebagian besar rempah-rempah tersebut akan mengendap di dasar bagian tengah cangkir. Mengapa ???

Sayap berlubang

Pada dekade lalu, beberapa sayap pesawat telah dilubangi dengan jutaan lubang yang sangat kecil oleh perusahaan pembuatnya. Lubang-lubang ini berdiameter kira-kira seperseribu inci dan dibuat dengan menggunakan laser.

Mengapa proses semahal ini dilakukan ??

Udara mempunyai berat

Berapa kira-kira berat 1 m³ udara setinggi permukaan laut ??

Pertama-tama tentukanlah sebuah pilihan berdasarkan intuisi dari daftar di bawah ini, kemudian buatlah perkiraannya !

a a. Kurang dari 1 ons

b b. Kira-kira 1 ons

c c. Kira-kira 5 ons

d d. Mendekati 10 ons

e e. Kira-kira 1 pon

f f. Lebih dari 2 pon

Langit seharusnya berwarna ungu

Penjelasan umum tentang alasan mengapa langit berwarna biru memerlukan bantuan teori hamburan Rayleigh, yaitu bahwa ujung cahaya biru spektrum kasat mata cahaya matahari dihamburkan dengan lebih efektif dibandingkan ujung cahaya merah. Sebenarnya, hamburan Rayleigh yang juga dikenal dengan hamburan sederap ini sebanding dengan tenaga keempat frekuensi cahaya, dengan cahaya biruyang dihamburkan 16 kali lebih kuat dibandingkan cahaya merah. Dengan cahaya biru yang secara efektif dipancarkan ke langit oleh molekul-molekul udara, kita akan melihat langit berwarna biru dan matahari kemerah-merahan. Akan tetapi, cahaya ungu pada spektrum kasat mata yang paling ujung mempunyai frekuensi lebih besar dibandingkan cahaya berwarna biru. Jadi, mengapa langit tiak berwarna ungu ???

By Alfianri ^^