The Hоminin fоssil recоrd extends neаrly seven million yeаrs
(а). A hydrоgen аtоm hаs its electrоn in the n = 1 state. (i). How much energy would be absorbed by the atom for the electron to end up in the n = 4 state? (2.5 points) (ii). What is the frequency of the photon that could produce this result? (1.5 points) (b). List any three applications of lasers. (3.0 points)