Photoelectric EffectMedium
Question
In a photoemissive cell with executing wavelength λ, the fastest electron has speed v. If the exciting wavelength is electrogen will be
Options
A.v(3/4)1/2
B.v
C.less than v
D.greater than v
Solution
We have from Einsteins photo electric equation.
Vmax =
If wavelength is changed to
then V′max =
i.e., V′max =
(∴ Vmax = v) i.e., v′max >
v
Vmax =
If wavelength is changed to
then V′max =
i.e., V′max =
(∴ Vmax = v) i.e., v′max >
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