Question

Write the Einstein's photo electric equation and define the
work function of a metal.​

Answer 1

Answer:

When the light means photons incident on a metal surface, the electrons are emitting from metal surface, called photoelectric effect.

The Einstein's Photo-Electric equation : KE

max

=hf−W

Here, KE

max

is the maximum kinetic energy of photo-electron, h is the Planck's constant, f is the frequency of incident light and W is the work function of the metal.

Explanation:

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Answer 2

۞ Answer ۞

✪ Einstein's photo electric equation ✪

K$_{max}$ = hυ - Φ

Here

• K$_{max}$ is the max kinetic energy

• h is the Plank's constant (6.626 x 1$0^{-34}$ J/Hz)
• υ is the frequency
• Φ is the work function

✪ Definition of work function of a metal.​ ✪

Work function (Φ) is the energy required to free an electron from nuclear attraction, or we can say that the minimum energy required to eject an electron out of that material is called work function of that material.