1. Monochromatic light of wavelength 632.8mm is generated by a helium-neon laser having power of 9.42mW. Evaluate the following: a) energy and momentum of each photon, b) The number of photons emitted per second, and c) speed of a hydrogen atom to have momentum equal to that of an emitted photon by the laser m=mass of a hydrogen atom= 1.67x1024kg 2. If an electron in a hydrogen atom moves from n=6 to n=4 state, what is the wavelength of the emitted photon. In what region of the electromagnetic spectrum does it reside