1
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2m away from the lens. If wavelength of light used is 5000$$\mathop A\limits^o $$ then the distance between the first minimum on either side of the central maximum is ($$\theta$$ is small and measured in radian)

A
2 $$\times$$ 10$$^{-2}$$ m
B
10$$^{-1}$$ m
C
10$$^{-2}$$ m
D
10$$^{-3}$$ m
2
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A graph is plotted between the fringe-width Z and the distance D between the slit and eye-piece, keeping other adjustment same. The correct graph is

(A) MHT CET 2020 19th October Evening Shift Physics - Wave Optics Question 75 English 1

(B) MHT CET 2020 19th October Evening Shift Physics - Wave Optics Question 75 English 2

(C) MHT CET 2020 19th October Evening Shift Physics - Wave Optics Question 75 English 3

(D) MHT CET 2020 19th October Evening Shift Physics - Wave Optics Question 75 English 4

A
A
B
B
C
D
D
C
3
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

The Brewster's angle for the glass-air interface is $(54.74)^{\circ}$. If a ray of light passing from air to glass strickes at an angle of incidence $45^{\circ}$, then the angle of refraction is

$$\left[\tan (54.74)^{\circ}=\sqrt{2}, \sin 45=\frac{1}{\sqrt{2}}\right]$$

A
$\sin ^{-1}(\sqrt{2})$
B
$\sin ^{-1}(1)$
C
$\sin ^{-1}(05)$
D
$\sin ^{-1}\left(\frac{1}{\sqrt{2}}\right)$
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A light wave of wavelength $$\lambda$$ is incident on a slit of width $$d$$. The resulting diffraction pattern is observed on a screen at a distance $$D$$. If linear width of the principal maxima is equal to the width of the slit, then the distance $$D$$ is

A
$$\frac{2 \lambda}{d}$$
B
$$\frac{d^2}{2 \lambda}$$
C
$$\frac{2 \lambda^2}{d}$$
D
$$\frac{d}{\lambda}$$
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