The ancient Greeks thought that light traveled in straight lines at high speeds

Question

true or false 

Answer 1

Empedocles of Acragas believed the speed of light was finite, whereas Aristotle thought light travelled at infinite speeds. The Ancient Greeks also thought that vision was the result of light radiating out of the eye. This was known as Emission Theory. Since the ancients had no way to test the speed of light, all their theories were based on rational thought, rather than practical experimentation.

Answer 2

True.

 

The first useful observations concerning light came from ancient Greece. The Greeks recognized that light travels through air in rays, a term from geometry describing that part of a straight line that extends in one direction only. Upon entering some denser medium, such as glass or water, as Greek scientists noticed, the ray experiences refraction, or bending. Another type of incidence, or contact, between a light ray and any surface, is reflection, whereby a light ray returns, rather than being absorbed at the interface.