MCQ
The wavelength of $X-$ rays decreases, when
- ATemperature of target is increased
- BIntensity 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
c
(c) ${\lambda _{\min }} = \frac{{hc}}{{eV{\rm{(energy)}}}};$
(c) ${\lambda _{\min }} = \frac{{hc}}{{eV{\rm{(energy)}}}};$
when $KE$ (or $eV)$ increases, $\lambda $ decreases.
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