1)

In a photoelectric effect measurement, the stopping potential for a given metal is found to be V0 volt when radiation of wavelength λ0 is used.lf radiation of wavelength 2λ0 is used with the same metal then the stopping potential (in volt) will be


A) V02

B) 2V0

C) V0+hc2eλ0

D) V0hc2eλ0

Answer:

Option D

Explanation:

eV0=hcλ0W0
and eV=hc2λ0W0

Subtracting them we have

e=(V0V)=hcλ0[112]=hc2λ0

or V=V0hc2eλ0