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X- rays coming out of an X -ray tube ....

X- rays coming out of an X -ray tube ______ .

A

Are monochromatic

B

Have all wavelengths below a certain minimum wavelength

C

Have all wavelengths above a certain minimum wavelength

D

Have all wavelength between a certain minimum and maximum wavelength

Text Solution

Verified by Experts

The correct Answer is:
C
X- ray spectrum is continuous with a cut-off at a minimum wavelength
`lambda_("min")=(hc)/(eV)`
At a given V , X-rays of wavelength lower than `lambda_("min")` are not emited.
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