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Question 11 Mark
Can X-rays be polarized?
Answer
Only transverse waves can be polarized. Since an X-ray is a transverse wave, it can be polarized.
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Question 21 Mark
The X-ray coming from a Coolidge tube has a cutoff wavelength of 80pm. Find the kinetic energy of the electrons hitting the target.
Answer
$\lambda=80\text{pm},$
$\text{E}=\frac{\text{hc}}{\lambda}$
$=\frac{1242}{80\times10^{-3}}$
$=15.525\times10^3\text{eV}=15.5\text{KeV}$
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Question 31 Mark
Can a hydrogen atom emit characteristic X-rays?
Answer
The difference of energy levels in a hydrogen atom is small. Hence, it is not able to emit characteristic X-rays.
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