1.

The transition from the state `n = 4` to `n = 3` in a hydrogen-like atom results in ultraviolet radiation. Infared radiation will be obtained in the transitionA. `2 rarr 1`B. `3 rarr 2`C. `4 rarr 2`D. `5 rarr 4`

Answer» Correct Answer - D
As the transition `n = 4` and `n = 3`, results in `UV` radiation and infared radiation involves smaller amounts of energy `UV`. So we require a transition involving initial value of `n` greater than `4` e.g. `5 rarr 4`.


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