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

The refractive index of glass is 1.5 and that of water is 1.33 . The critical angle for a ray of light going from glass to water is

A
$$\sin ^{-1}\left(\frac{4}{7}\right)$$
B
$$\sin ^{-1}\left(\frac{5}{8}\right)$$
C
$$\sin ^{-1}\left(\frac{8}{9}\right)$$
D
$$\sin ^{-1}\left(\frac{2}{3}\right)$$
2
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A convex lens is dipped in a liquid whose refractive index is equal to refractive index of lens material. Then its focal length will

A
increase
B
remain unchanged
C
become infinite
D
become zero
3
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A ray of light is incident at an angle 'I' on one face of thin prism. The ray emerges normally from the other face. Refractive index of the glass prism is '$$n$$' and angle of prism is '$$A$$'. The value of '$$\mathrm{I}$$' is

A
An
B
$$\mathrm{An}^2$$
C
$$\frac{\mathrm{A}}{\mathrm{n}}$$
D
$$\frac{\mathrm{A}}{\mathrm{n}^2}$$
4
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A glass cube of length $$24 \mathrm{~cm}$$ has a small air bubble trapped inside. When viewed normally from one face it is $$10 \mathrm{~cm}$$ below the surface. When viewed normally from the opposite face, its apparent distance is $$6 \mathrm{~cm}$$. The refractive index of glass is

A
1.50
B
1.40
C
1.45
D
1.55
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