NEET Physics Question - Modern Physics

Assertion (A): Frequency of characteristic X-ray will change if atomic number of target is changed.

Reason (R): When high energy electron strikes on target then characteristics and continuous X-rays are emitted.

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:

Assertion (A) is true: Characteristic X-ray frequency depends on the atomic number \(Z\) of the target (Moseley's Law, \(f \propto (Z-b)^2\)). Reason (R) is true: Both characteristic and continuous X-rays are emitted during electron bombardment. However, (R) describes the emission process generally, not the \(Z\)-dependence of characteristic X-ray frequency, so it's not the correct explanation.

Rankers Physics

Characteristic X-ray Frequency and Atomic Number

Solution:

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