Question 7
(a) Write the de-Broglie equation.
(b) Explain the significance of the equation.
Observation
It was not a popular question among the candidates though fairly attempted. Most candidates were able to write the de-Broglie equation but were unable to explain the significance of the equation. Instead they had the view that the equation was for the calculation of wavelength of a photon.
The expected answer is:
(a) = OR λ =
(b) A particle of mass(m) moving with velocity/ speed (v) has an associated
wavelength (). The wavelength decreases with increase in momentum/
velocity