Photocell is kept at distance of 1 m from the source and incident radiation .Now distance from source is changed to 2m,then….

Options

A. no. of photoelectron emitted are `(1)/(4)` times intital value.
B. energy of electron emitted is `(1)/(4)` times intitial energy
C. no. of electron emitted is half of intital electron emitted.
D. Energy of electron emitted is half of initial energy

Answer

A

Explanation

Power `prop` number of electron emitted N.
Power `prop(1)/(2)impliesNprop (1)/(r^(2))`