The wavelength of X-rays decreases, when - Vidyadip

MCQ

The wavelength of X-rays decreases, when

A
Temperature of target is increased
B
Intensity of electron beam is increased
✓
K.E. of electrons striking the target is increased
D
K.E. of electrons striking the target is decreased

✓

Answer

Correct option: C.

K.E. of electrons striking the target is increased

$ \lambda_{\min }=\frac{h c}{e V \text { (energy) }}$; when $K E$ (or $e V$ ) increases, $\lambda$ decreases.

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