question_answer 6)

A hydrogen atom initially in the ground level absorbs a photon which excites it to the n = 4 level. Determine the wavelength and frequency of photon. 

Answer:

We know, energy of an electron in the nth orbit of hydrogen atom is given by                 When n = 1 (ground level), When Energy difference between n = 1 and n = 4 The hydrogen atom will go to n = 4 from n = 1 if the photon energy oror