Photoelectric EffectMedium
Question
The de Broglie wavelength of an electron moving with a velocity 1.5 × 108 ms-1 is equal to that of a photon. The ratio of the kinetic energy of the electron to that of the energy of photon is :
Options
A.2
B.4
C.1/2
D.1/4
Solution
λd = 
Eλ = energy of photon =
e− = 
The required ratio =
Eλ = energy of photon =
e− = The required ratio =
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