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Statement I: In an X-ray tube , if the e...

Statement I: In an X-ray tube , if the energy with which an electron strickes the metal target increases , then the wavelength of the characteristic X-rays also changes.
Statement II : Wavelength of the characteristic X-rays depends only on the initial and final energy levels.

A

Statement I is True , Statement II is True , Statement II is a correct explanation for Statement I.

B

Statement I is True , Statement II is True , Statement II is NOT a correct explanation for Statement I.

C

Statement I is True , Statement II is False.

D

Statement I is False , Statement II is True.

Text Solution

Verified by Experts

The correct Answer is:
D
As the energy of striking electron is increased, the wavelength of the characteristic X-ray does not change as characteristic X-ray are emitted when electrons are making transition from a higher energy level to a lower of characteristic X-ray is given by
`E = (hc)/(lambda) = |E_(f)| - |E_(i)| = E_(i) - E_(f)`
which does not depend at all on the energy of the striking electron. The only dependence is that the striking electron from the inner shell.
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