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
3→2
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B
4→2
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C
5→4
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D
2→1
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Solution
The correct option is C5→4 Infra- red radiation has lesser energy than Ulta-Violet radiation. Hence the transition should take place between energy levels which have lesser energy. 5→4