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2007-08-28 03:43:12 · 7 answers · asked by ann 1 in Science & Mathematics Astronomy & Space

7 answers

The first human beings.

2007-08-28 05:28:38 · answer #1 · answered by ⇐DâV£ MaΧiMiÅnO⇒ 6 · 0 0

if you mean who discovered light travelled in Photons, then it was Einstein. IF you mean who first discovered light then it was the stone people or whoever was human first.

2007-08-28 12:37:02 · answer #2 · answered by Anonymous · 0 0

A lot of you people will answer 'Einstein' The answer is partly right and partly wrong. It's the stone age people that discovered it first!

2007-08-28 10:49:10 · answer #3 · answered by Anonymous · 0 0

Indian theories
In ancient India, the philosophical schools of Samkhya and Vaisheshika, from around the 6th–5th century BC, developed theories on light. According to the Samkhya school, light is one of the five fundamental "subtle" elements (tanmatra) out of which emerge the gross elements. The atomicity of these elements is not specifically mentioned and it appears that they were actually taken to be continuous.

On the other hand, the Vaisheshika school gives an atomic theory of the physical world on the non-atomic ground of ether, space and time. (See Indian atomism.) The basic atoms are those of earth (prthivı), water (apas), fire (tejas), and air (vayu), that should not be confused with the ordinary meaning of these terms. These atoms are taken to form binary molecules that combine further to form larger molecules. Motion is defined in terms of the movement of the physical atoms and it appears that it is taken to be non-instantaneous. Light rays are taken to be a stream of high velocity of tejas (fire) atoms. The particles of light can exhibit different characteristics depending on the speed and the arrangements of the tejas atoms. Around the first century BC, the Vishnu Purana correctly refers to sunlight as the "the seven rays of the sun".

Later in 499, Aryabhata, who proposed a heliocentric solar system of gravitation in his Aryabhatiya, wrote that the planets and the Moon do not have their own light but reflect the light of the Sun.

The Indian Buddhists, such as Dignāga in the 5th century and Dharmakirti in the 7th century, developed a type of atomism that is a philosophy about reality being composed of atomic entities that are momentary flashes of light or energy. They viewed light as being an atomic entity equivalent to energy, similar to the modern concept of photons, though they also viewed all matter as being composed of these light/energy particles.


Greek and Hellenistic theories
In the fifth century BC, Empedocles postulated that everything was composed of four elements; fire, air, earth and water. He believed that Aphrodite made the human eye out of the four elements and that she lit the fire in the eye which shone out from the eye making sight possible. If this were true, then one could see during the night just as well as during the day, so Empedocles postulated an interaction between rays from the eyes and rays from a source such as the sun.

In about 300 BC, Euclid wrote Optica, in which he studied the properties of light. Euclid postulated that light traveled in straight lines and he described the laws of reflection and studied them mathematically. He questioned that sight is the result of a beam from the eye, for he asks how one sees the stars immediately, if one closes ones eyes, then opens them at night. Of course if the beam from the eye travels infinitely fast this is not a problem.

In 55 BC, Lucretius, a Roman who carried on the ideas of earlier Greek atomists, wrote:

"The light and heat of the sun; these are composed of minute atoms which, when they are shoved off, lose no time in shooting right across the interspace of air in the direction imparted by the shove." - On the nature of the Universe

Despite being similar to later particle theories, Lucretius's views were not generally accepted and light was still theorized as emanating from the eye.

Ptolemy (c. 2nd century) wrote about the refraction of light, and developed a theory of vision that objects are seen by rays of light emanating from the eyes.

2007-08-28 10:57:33 · answer #4 · answered by hrishikesh48 2 · 0 1

"Then the God said ,let there be light and light was there".[or words to that effect].Obviously,God was the first one to discover it.Having said that ,I can not really back it up with any proof .So,I suppose Light was there even before we evolved in to some thing as a meaningful entities,.

2007-08-28 10:50:41 · answer #5 · answered by brkshandilya 7 · 0 3

if you mean who invented light its Thomas Edison, but if you mean who dicovered light, i will tell you humanbeing, cause its something around us cant be hiden.

2007-08-28 10:59:51 · answer #6 · answered by tarkan 2 · 0 0

If I may, I believe it was me. About 25 years ago. When I uttered my first word: "light".

Royalties please.

2007-08-29 10:08:10 · answer #7 · answered by Essay W 2 · 0 0

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