1
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A particle executes linear S.H.M. The mean position of oscillation is at the principal axis of a convex lens of focal length $$8 \mathrm{~cm}$$. the mean position of oscillation is at 14 cm from the lens with amplitude 1 cm. The amplitude of oscillating image of the particle is nearly

A
3 cm
B
5 cm
C
2 cm
D
4 cm
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A convex lens of focal length $$\mathrm{T}$$ is used to form an image whose size is one fourth that of size of the object. Then the object distance is

A
2f
B
5f
C
4f
D
3f
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Inside a vessel filled with liquid a converging lens is placed as shown in figure. The lens has focal length $$15 \mathrm{~cm}$$ when in air and has refractive index $$\frac{3}{2}$$. If the liquid has refractive index $$\frac{9}{5}$$, the focal length of lens in liquid is

A
15 cm
B
$$-$$60 cm
C
90 cm
D
$$-$$45 cm
4
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A ray of light travels from a denser medium to a rarer medium. The reflected and the refracted rays are perpendicular to each other. If '$$r$$' and '$$r_1$$' are the angle of reflection and refraction respectively and '$$\mathrm{C}$$' is the critical angle, then the angle of incidence is

A
$$\cot ^{-1}(\sin \mathrm{C})$$
B
$$\sin ^{-1}(\tan C)$$
C
$$\tan ^{-1}(\sin C)$$
D
$$\cos ^{-1}(\tan \mathrm{C})$$
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