1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In Young's experiment with a monochromatic source and two slits, one of the slits is covered with black opaque paper, the fringes will

A
be darker
B
be narrower
C
be broader
D
not be observed
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the interference experiment using a biprism, the distance of the slits from the screen is increased by $$25 \%$$ and the separation between the slits is halved. If '$$W$$' represents the original fringewidth, the new fringewidth is

A
2 W
B
2.5 W
C
4 W
D
1.5 W
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In biprims experiment, the $$4^{\text {th }}$$ dark band is formed opposite to one of the slits. The wavelength of light used is $$(\mathrm{d}=$$ distance between the slits, $$\mathrm{D}=$$ distance between scource and the screen)

A
$$\frac{\mathrm{d}^2}{14 \mathrm{D}}$$
B
$$\mathrm{\frac{d^2}{7 D}}$$
C
$$\frac{d^2}{9 \mathrm{D}}$$
D
$$\frac{d^2}{11 \mathrm{D}}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment using monochromatic light of wavelength '$$\lambda$$', the maximum intensity of light at a point on the screen is $$\mathrm{K}$$ units. The intensity of light at point where the path difference is $$\frac{\lambda}{3}$$ is

$$\left[\cos 60^{\circ}=\sin 30^{\circ}=\frac{1}{2}\right]$$

A
$$\frac{K}{4}$$
B
$$\frac{3 K}{4}$$
C
K
D
$$\frac{\mathrm{K}}{2}$$
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