Question

If the kinetic energy of an electron is increased 4 times, the wavelength of the de Broglie wave associated with it would becomes:
A. 4 times
B. 2 times
C. `(1)/(2)` times
D. `(1)/(4)` times

Answer 1

Correct Answer - C
`lamda=(h)/(sqrt(2Em))`, where E=kinetic energy
When the kinetic energy of electron becomes 4 times, the de broglie wavelength will become half.j