1
MHT CET 2023 9th May Morning Shift
+1
-0

A beam of unpolarized light passes through a tourmaline crystal A and then it passes through a second tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of emergent light is $$I_0$$. Now B is rotated by $$45^{\circ}$$ about the ray. The emergent light will have intensity $$\left(\cos 45^{\circ}=\frac{1}{\sqrt{2}}\right)$$

A
$$\frac{\mathrm{I}_0}{2}$$
B
$$\frac{\mathrm{I}_0}{\sqrt{2}}$$
C
$$\frac{\sqrt{2}}{\mathrm{I}_0}$$
D
$$\frac{2}{\mathrm{I}_0}$$
2
MHT CET 2023 9th May Morning Shift
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In a diffraction pattern due to single slit of width '$$a$$', the first minimum is observed at an angle of $$30^{\circ}$$ when the light of wavelength $$5400 \mathop A\limits^o$$ is incident on the slit. The first secondary maximum is observed at an angle of $$\left(\sin 30^{\circ}=\frac{1}{2}\right)$$

A
$$\sin ^{-1}\left(\frac{3}{4}\right)$$
B
$$\sin ^{-1}\left(\frac{2}{3}\right)$$
C
$$\sin ^{-1}\left(\frac{1}{2}\right)$$
D
$$\sin ^{-1}\left(\frac{1}{4}\right)$$
3
MHT CET 2023 9th May Morning Shift
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In a single slit experiment, the width of the slit is doubled. Which one of the following statements is correct?

A
The intensity and width of the central maximum are unaffected.
B
The intensity remains same and angular width becomes half.
C
The intensity and angular width both are doubled.
D
The intensity increases by a factor 4 and the angular width decreases by a factor of $$\frac{1}{2}$$.
4
MHT CET 2023 9th May Morning Shift
+1
-0

The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called

A
spherical aberration
B
distortion
C
coma
D
chromatic aberration
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