Why is Alhazen known as the pioneer of modern optics?

Born in the tenth century AD, Alhazen was an Arab who was known as the first true scientist.

He developed the scientific method of experimentation, and was the first person to formulate hypothesis and conduct verifiable experiments. A scientist, philosopher, astronomer, and mathematician, Alhazen wrote over a hundred books, more than half of which have been preserved.

One of his most influential writings was in the field of optics. In this book Alhazen gave experimental proof of the nature of light, the structure of the eye and the basic principles of reflection via mirror. He stated that contrary to popular belief, the eye does not send out rays to the object it sees. Rather it is the light reflected via the object that the eye beholds.

This was a completely new and revolutionary concept. The book comprises sevenvoles, and was translated into Latin.

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What is Eratosthenes famous for?

He was famous as a mathematician and geographer. Eratosthenes produced a reliable, logical method to discover prime numbers. It's known as the sieve of Eratosthenes, and is still important in modern number theory in an updated form. Assuming that the Earth was a sphere, Eratosthenes calculated its size with good accuracy. He also calculated the tilt of Earth's axis fairly accurately. Eratosthenes produced the first map of the world which used meridian lines and parallel lines. These were similar to our modern lines of latitude and longitude. This great scientist can be said to have invented geography. In fact, today we still use the word he invented for this new discipline. Geo' was Greek for Earth' and 'graphy' meant 'field of study." Eratosthenes also wrote books on philosophy, mathematics, astronomy, history, comedy, and poetry. His all-round knowledge made him the ideal choice for the most prestigious job an academic could en

Why is Euclid called the father of geometry'?

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What are the major contributions made by Archimedes?

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