NEET Physics Question - Modern Physics

Assertion (A): The value of Rydberg constant is independent of mass of nucleus.

Reason (R): Electrons revolve around stationary nucleus of atom.

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

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

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

The Rydberg constant for a given atom depends on the reduced mass, which includes the nuclear mass. So (A) is false. The assumption of a stationary nucleus is an approximation; both electron and nucleus orbit their center of mass. So (R) is false.

Rankers Physics

Rydberg Constant and Nuclear Mass

Solution:

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