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Question

The transition from the state n = 4 to n = 3 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition.

A
21
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B
32
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C
42
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D
54
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Solution

The correct option is D 54
The infrared radiations have lower energy than Ultraviolet radiation. The only possible transition is n=5 to n = 4. As n increases, the difference of successive energy level decreases and energy emitted also decreases.

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