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The energy of a I, II and III energy lev...

The energy of a I, II and III energy levels of a certain atom are E, `(4E)/(3)` and 2E respectively A photon of wavelength `lambda` is emitted during a transition from III to I. What will be the wavelength of emission for transition II to I?

A

`(lambda)/(2)`

B

`lambda`

C

`2lambda`

D

`3lambda`

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