Q.

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?

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a

0.25 A0

b

0.5 A0

c

1.5 A0

d

1.0 A0

answer is A.

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Detailed Solution

λmin=1237540,000=0.30Å. Hence wavelength less than 0.30Å is not possible.
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