1
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

MHT CET 2021 20th September Evening Shift Physics - Ray Optics Question 78 English

A
15 cm
B
$$-$$60 cm
C
90 cm
D
$$-$$45 cm
2
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
$$\cos ^{-1}(\tan \mathrm{C})$$
3
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A convex lens of focal length 'F' produces a real image 'n' times the size of the object. The image distance is

A
F(n + 1)
B
F(n $$-$$ 1)
C
$$\mathrm{\frac{F}{(N+1)}}$$
D
$$\mathrm{\frac{F}{(n-1)}}$$
4
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A ray of light is incident at an angle $i$ on one face of a thin angled prism. The ray emerges normally from the other face. Refractive inder of the glass prims is $n$ and angle of prism is $A$. The value of $i$ is

A
$A n$
B
$A^2 n$
C
$A n^2$
D
$\frac{1}{A n}$
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