H C Verma Solutions for Chapter: X-rays, Exercise 2: OBJECTIVE

Frequencies of ${\mathrm{K}}_{\mathrm{\alpha }}$ X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency $v$ and the atomic number $Z$.

The X-ray beam coming from an X-ray tube

One of the following wavelengths is absent and the rest are present in the X-rays coming from a Coolidge tube. Which one is the absent wavelength?

The figure shows the intensity-wavelength relations of $X‐$rays coming from two different Coolidge tubes. The solid curve represents the relation for the tube $A$ in which the potential difference between the target and the filament is $V_{\mathrm{A}}$ and the atomic number of the target material is $Z_{\mathrm{A}}$. These quantities are $V_{\mathrm{B}}$ and $Z_{\mathrm{B}}$ for the other tube. Then,

$50\%$ of the X-ray coming from a Coolidge tube is able to pass through a $0.1 \mathrm{mm}$ thick aluminium foil. If the potential difference between the target and the filament is increased, the fraction of the X-ray passing through the same foil will be

$50\%$ of the X-ray coming from a Coolidge tube is able to pass through a $0.1 \mathrm{mm}$ thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of aluminum foil, which will allow $50\%$ of the X-ray to pass through, will be

$X-$ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the $X-$ray transmitted by the foil is found to be $I_0$. The heating current is increased so as to increase the temperature of the filament. The intensity of the $X-$ray transmitted by the foil will be

Visible light passing through a circular hole forms a diffraction disc of radius $0.1 \mathrm{mm}$ on a screen. If X-ray is passed through the same set-up, the radius of the diffraction disc will be