by how much would the stopping potential for a given photosensitive surface go up if the frequency of the - Physics - Dual Nature of Radiation and Matter

Question

by how much would the stopping potential for a given photosensitive
surface go up if the frequency of the incident radiations were to
be increased from 4*10^15 hz to 8 *10^15 hz​

Pintu B. · Accepted Answer

Dear Student ,
Here in this case stopping potential Vs is given by
,
eVs=hν-W⇒Vs=heν-WeWhen , ν1=4×1015 Hz , Vs=Vs1sayWhen , ν2=8×1015 Hz , Vs=Vs2sayTherefore,Vs1=heν1-We       and   Vs2=heν2-WeSubtracting we get , Vs2- Vs1=heν2-ν1=6·4×10-341·6×10-198×1015-4×1015=16 volt 
Regards

by how much would the stopping potential for a given photosensitive surface go up if the frequency of the incident radiations were to be increased from 4*10^15 hz to 8 *10^15 hz​

by how much would the stopping potential for a given photosensitive surface go up if the frequency of the incident radiations were to be increased from 410^15 hz to 8 10^15 hz