PLEASE MATCH YOUR ASSIGNMENT QUESTIONS ACCORDING TO YOUR SESSION
IGNOU MPH-04 (January 2026 – December 2026) Assignment Questions
PART A
1. a) Electrons are accelerated through a potential 150 V and incident on a crystal with interatomic spacing d = 0.20 nm. Calculate the de Broglie wavelength and the firstorder Bragg diffraction angle.
b) Estimate the uncertainty in the energy of a photon localized within a distance of 0.1 nm.












