If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 mathringA to 4000 mathringA then

Question

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 mathringA to 4000 mathringA then (A) Stopping potential will decrease (B) Stopping potential will increase (C) Kinetic energy of emitted electrons will decrease (D) The value of work function will decrease

Tardigrade Admin · Accepted Answer

Stopping potential V0=(h c/e)[(1/λ)-(1 /λ0)]. As λ decreases so V0 increases.

Q. If in a photoelectric experiment, the wavelength of incident radiation is reduced from $6000 \overset{˚}{A}$ to $4000 \overset{˚}{A}$ then

Stopping potential will decrease

Stopping potential will increase

Kinetic energy of emitted electrons will decrease

The value of work function will decrease

Stopping potential $V_{0} = \frac{h c}{e} [\frac{1}{λ} - \frac{1}{λ _{0}}]$ .
As $λ$ decreases so $V_{0}$ increases.

Q. If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000A˚ to 4000A˚ then