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A beam of electrons striking a copper ta...

A beam of electrons striking a copper target produces X - rays. Its spectrum is as shown. Keeping the voltage same if the copper target is replaced with a different metal, the cut - off wavelength and characteristic lines of new spectrum will change in comparison with odd as

A

Cut-off wavelength will remain unchanged while characteristic lines will be different.

B

both cut-off wavelength and characteristic lines will remains unchanged

C

both cut-off wavelength and characteristic lines will be different.

D

cut-off wavelength wll be different while characteristic lines will remain unchanged.

Text Solution

Verified by Experts

The correct Answer is:
A
Cut-off wavelength of emitted X-rays depends on maximum kinetic energy of encident electrons on the target and is independent of nature of target. The characteristic lines depend on nature of material of target.
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