Question

If the momentum of an electron doubles, its de Broglie wavelength is multiplied by a factor of

(A) 1/4 

(B)1/2 

(C) 1 

(D) 2 

(E) 4

Answer 1

Option (B) is correct

Explanation

We know the following equation

This equation suggests that wave length will be 1/2 of initial value if momentum is doubled.

Answer 2

The correct option is: (B)1/2 

Explanation:

From p = h/ λ, 2x p means ½ the wavelength.