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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 from :

A
32
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B
42
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C
54
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D
21
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Solution

The correct option is C 54
Infra- red radiation has lesser energy than Ulta-Violet radiation. Hence the transition should take place between energy levels which have lesser energy.
54

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