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

n= 6 to n = 1

n = 5 to n = 4

n= 6 to n = 5

n = 5 to n = 3

Solution

n= 6 to n = 5

increment straight E space proportional to open square brackets space fraction numerator 1 over denominator straight n subscript 1 superscript 2 end fraction minus fraction numerator 1 over denominator straight n subscript 2 superscript 2 end fraction close square brackets space comma space where space straight n subscript 2 greater than straight n subscript 1

Energy of photon obtained from the transition n = 6 to n = 5 will have least energy.

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