![]() ![]() ![]() Geometric optics is a useful tool that we can use to explain many of these phenomena. In this manner, the great physicists have continued to debate and demonstrate the true nature of light over the centuries. Nature has many interesting phenomena involving light. On the other hand, the wave theory cannot clarify why photons fly out of metal that is exposed to light (the phenomenon is called the photoelectric effect, which was discovered at the end of the 19th century). The corpuscular theory, however, cannot explain wave-like light phenomena such as diffraction and interference. Light travels in a straight line, and therefore it was only natural for Newton to think of it as extremely small particles that are emitted by a light source and reflected by objects. Around the same time, there were other scholars who thought that light might instead be a wave (wave theory). The reflection of light can be categorized into two types as specular reflection and diffuse reflection based on the texture of the surface from which the light reflects. ![]() Let's travel through history as we study the matter.Īround 1700, Newton concluded that light was a group of particles (corpuscular theory). Just what is the true nature of light? Is it a wave or perhaps a flow of extremely small particles? These questions have long puzzled scientists. ![]()
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