1
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

One of the slits in Young's double slit experiment is covered with a transparent sheet of thickness $$2.9 \times 10^{-3} \mathrm{~cm}$$. The central fringe shifts to a position originally occupied by the $$25^{\text {th }}$$ bright fringe. If $$\lambda=5800$$ $$\mathop A\limits^o $$, the refractive index of the sheet is

A
1.65
B
1.60
C
1.55
D
1.50
2
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment the intensities at two points, for the path difference $$\frac{\lambda}{4}$$ and $$\frac{\lambda}{3}$$ ($$\lambda=$$ wavelength of light used) are $$I_1$$ and $$I_2$$ respectively. If $$\mathrm{I}_0$$ denotes the intensity produced by each one of the individual slits then $$\frac{\mathrm{I}_1+\mathrm{I}_2}{\mathrm{I}_0}$$ is equal to $$\left(\cos 60^{\circ}=0.5, \cos 45^{\circ}=\frac{1}{\sqrt{2}}\right)$$

A
1
B
2
C
3
D
4
3
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In two separate setups for Biprism experiment using same wavelength, fringes of equal width are obtained. If ratio of slit separation is $$2: 3$$ then the ratio of the distance between the slit and screen in the two setups is

A
$$2: 3$$
B
$$1: 2$$
C
$$4: 9$$
D
$$9: 4$$
4
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A beam of light is incident on a glass plate at an angle of $$60^{\circ}$$. The reflected ray is polarized. If angle of incidence is $$45^{\circ}$$ then angle of refraction is

A
$$\sin ^{-1}\left(\frac{1}{\sqrt{6}}\right)$$
B
$$\sin ^{-1}\left(\frac{1}{\sqrt{3}}\right)$$
C
$$\sin ^{-1}\left(\sqrt{\frac{3}{2}}\right)$$
D
$$\cos ^{-1}\left(\sqrt{\frac{3}{2}}\right)$$
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