physics unit 1

reflection

When light or sound or waves bounce back after hitting the surface

diffraction

When wave spread out after passing through a narrow opening or around the edges of an obstacle

refraction

When waves been because they passed from one medium into another, which changes their speed

experiment #1

The name of the experience was photoelectric effect. It was done by Albert Einstein. The result it showed others that light was compressive particles. Light packages of energy light is broken up into individual packages.

experiment #2

The person was Thomas Young. The experiment was called double slit experiment and the results were light is a wave.

who discovered light?

Allhazen was early optics, huygens and newton debated if light was particles or waves, young and fresnel confirmed it was waves, maxwell = light= electromagnetic waves.

what is the speed of light

what’s plancks is constant

6.6×10-35