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Question
The energy levels of an atom are as shown below. Which of them will result in the transition of a photon of wavelength 275 nm?
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Solution
Energy transitions for A,B,C, and D are:
A = 2 eV
B = 4.5 eV
C = 2.5 eV
D = 8 eV
`E=(hC)/lamda`
Where,
E = Energy transition
λ = Wavelength
h = 6.63 × 10−34 Js
C = 3 × 108 m/s
For B, we have
`lambda = (6.63 xx 10^-34 xx 3 xx 10^8)/(4.5 xx 1.6 xx 10^-19)`
`lambda = 275`nm
Thus, B will result in transition of a photon of wavelength of 275 nm.
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