question_answer

If the kinetic energy of a free electron doubles, its de-Broglie wavelength changes by the factor     AIEEE  Solved  Paper-2005

A) \[\frac{1}{2}\]     

B)                       2                             

C)        \[\frac{1}{\sqrt{2}}\]    

D)        \[\sqrt{2}\]

Correct Answer: C

Solution :

We know that, de-Broglie equation is and the kinetic energy,   Thus,