Assertion : Wave number of a spectral line for an electronic transition is quantized.
Reason : Wave number is directly proportional to the velocity of electron undergoing the transition.

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Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

(A) is true but (R) is false

answer is C.

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Detailed Solution

$\vec{V} = R (\frac{1}{n_{1}^{2}} - \frac{1}{n_{1}^{2}})$ . Thus, $\bar{v}$ does not depend on the electron's speed, but rather just on the orbits ( $n_{1}$ and $n_{2}$ ) between which the transition occurs.

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