Question

The energy levels of a quantum mechanical system are given by the equation: En = -hfo/√n^2+9....

The energy levels of a quantum mechanical system are given by the equation: En = -hfo/√n^2+9. given: fo = 10^15 Hz, n = 0,1,2...

a) Determine the frequency and wavelength of photon emitted in a transition form level 2 to the ground state (n=0)

b) In the transition in a), how many photons are emitted per second in order to produce a radiation power of .002W?

I did part a using the equation Eph = hf, then E2 - E0 = hf, and plugging in E2 and E0 into the equation above. Is this right? And please help with part b, thanks!

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