Question

Identify the de – Broglie expression from the following.

(a) λ=h×p

(b) λ=\(\frac {h}{p}\)

(c) λ=h+p

(d) λ=h-p

I have been asked this question during a job interview.

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

Answer 1

The correct choice is (b) λ=\(\frac {h}{p}\)

The explanation is: de – Broglie equation states that matter can act as waves as well as particles. So, the de Broglie equation helps us understand the concept of matter having a wavelength. The expression for  de – Broglie wavelength is given as:

λ=\(\frac {h}{p} = \frac {h}{mv}\)

Where h is the Planck’s constant; p is the momentum; m is the mass of the particle and v is the velocity of the particle.