Q135. What is the uncertainty in the energy of a photon emitted from an atom, if the lifetime of the excited state is 104 s?Physics — NUST Mock By IBAGRADS 2 — Question 135 of 200A. 4 × 107 JB. 4 × 10-17 eVC. 6.6 × 10-20 eVD. 40 JPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →