Wave motionHard

Question

The increase in the energy of an electron for changing its de-Broglie wavelength from 1 (Ao) to 0.5 (Ao) will be-

Options

A.1.5 keV
B.0.45 keV
C.0.25 keV
D.100 eV

Solution

As V1 =        so E1 = 150 eV
V2 =     so E2 = 600 eV
⇒  E2 - E1 = 450 eV = 0.45 keV

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