First slide

Hydrogen spectrum

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

Moderate

A

$2 \to 1$
B

$3 \to 2$
C

$4 \to 2$
D

$5 \to 4$

Solution

As the transition n = 4 and n = 3, results in UV radiation and infrared radiation involves smaller amounts of energy than UV. So we require a transition involving initial values
of n greater than 4 e.g. $5 \to 4$ .

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