Question

Who discovered saturn's rings and divised the wave theory of light

Answer 1

In 1655, Dutch astronomer and mathematician , Christiann Huygens proposed that Saturn was surrounding by a solid ring which contains ice and dust. He was surprised to see that besides the rings, the planet also had a large moon, known as Titan.
In 1690, Christiann Huygens worked out with wave theory of light. He proposed that Light behaves like wave.For example. Diffraction.