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Q.

When a beam of accelerated electrons hits a target, a continuous X-ray spectrum is emitted from the target. Which of the following wavelengths is absent in X-ray spectrum, if the X-ray tube is operating at 40,000 volts?

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a

0.25 Ao

b

0.5 Ao

c

1.5 Ao

d

1.0 Ao

answer is A.

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Detailed Solution

λmin=1237540,000=0.30Ao.Hence  wavelentgh  less  than  0.30Ao  is  not  possible.
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