Anucleus in a transition from an excited state emits a gamma-ray photon with an energy of 2.5 mev. (a)
what is the photon frequency? (b) what is the photon wavelength? (c) how does the wavelength compare
with typical nuclear radii (of the order 10−15 m)?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th