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

In biprism experiment, $$6^{\text {th }}$$ bright band with wavelength '$$\lambda_1$$' coincides with $$7^{\text {th }}$$ dark band with wavelength '$$\lambda_2$$' then the ratio $$\lambda_1: \lambda_2$$ is (other setting remains the same)

A
$$7: 6$$
B
$$13: 12$$
C
$$12: 13$$
D
$$6: 7$$
2
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
3
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
4
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
$$\frac{d^2}{11 \mathrm{D}}$$
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