When a beam of accelerated electrons hits a target, a continuous … - Vidyadip

MCQ

When a beam of accelerated electrons hits a target, a continuous $X-$ ray spectrum is emitted from the target. Which of the following wavelength is absent in the $X-$ ray spectrum, if the $X-$ ray tube is operating at $40,000$ volts........$\mathop A\limits^o $

✓
$0.25 $
B
$0.5 $
C
$1.5 $
D
$1$

✓

Answer

Correct option: A.

$0.25 $

a
(a) ${\lambda _{\min }} = \frac{{12375}}{{40,000}} = 0.30\,{Å}$ Hence wavelength less than $0.30 Å$ is not possible.

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