Question

Each question contains statement 1- statement 2. Choose the correct answer (only one option is correct) from the following options.

Statement-1: Though light of a single frequency (monochromatic) is incident on a metal, the energies of emitted photoelectrons are different.
Statement-2 : The energy of electrons emitted from inside the metal surface, is lost in collision with the other atoms in the metal.

• A. Statement-1 is false, Statement -2 is true
• B. Statement -1 is true, Statement-2 is true; Statement -2 is a correct explanation for statement-1
• C. Statement -1 is true, Statement-2 is true; Statement -2 is not correct explanation for statement-1
• D. Statement-1 is true, Statement -2 is false

Answer 1

The correct option is B Statement -1 is true, Statement-2 is true; Statement -2 is a correct explanation for statement-1

The photoelectric Law states,

$K{E}_{max}=hv-W_o$

It gives only the maximum amount of KE possible. The emitted electrons can have energy anywhere in the range ($0,K{E}_{max}$)

When a light of single frequency falls on the electrons of inner layer of metal, this electrons come out of the metal surface after a large number of collisions with atoms of it's upper layer.