Question

explain Einstein Photoelectric effect and state and explain de Broglie relation of matter wave ​

Answer 1

Explanation:

Einstein explained the photoelectric effect by describing light as composed of discrete particles. Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons, which would eventually lead to the concept of wave-particle duality.

Answer 2

Hope this helps you.

Explanation:

Albert Einstein first explained the wave–particle duality of light in 1905. Louis de Broglie hypothesized that any particle should also exhibit such a duality. The velocity of a particle, he concluded, should always equal the group velocity of the corresponding wave.