Question

When the wavelength of an electron increases, the velocity of the electron will also increase.

(a) True

(b) False

This question was posed to me in an interview for internship.

My question is from Wave Nature of Matter in chapter Dual Nature of Radiation and Matter of Physics – Class 12

Answer 1

Correct choice is (b) False

To explain I would say: No, this is a false statement. According to the de – Broglie equation, the velocity of the particle and the de – Broglie are inversely proportional to each other. Therefore, when the wavelength of an electron increases, the velocity of the electron decreases.