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Q.

The figure indicates the energy levels of a certain atom. When the system moves from 2E level to E, a photon of wavelength λ is emitted. The wavelength of a photon produced in transition from level 4E3 to level E is

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a

λ3

b

3λ4

c

4λ3

d

answer is D.

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Detailed Solution

(4)hCλ =2E−E=E   and   hCλ' =4E3−E=E3∴    λ'λ =EE/3=3  ⇒ λ' =3λ
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