devarshi-dt-logo

Question:

According to the Bohr Theory, which of the following transactions in the hydrogen atom will give rise to the least energetic photon?

n=5ton=4

n=6ton=1

n=6ton=5

n=5ton=3

Solution:

Energy levels are inversely proportional to the square of n. Therefore, the least energetic photon would be when the difference between the energy levels is least. This would be when the difference is only 1 level of n. Higher the n, lower the energy. Thus, the transition from n=6 to n=5 would produce the least energetic photon.