MHT CET 2021 22th September Morning Shift | Ray Optics Question 76 | Physics

The critical angle for light going from medium A into medium B is $$\theta$$. The speed of light in the medium A is $$\mathrm{V}_{\mathrm{A}}$$. What is the speed of light in the medium $$\mathrm{B}$$ ?

$$\mathrm{V}_{\mathrm{A}} \sin \theta$$

$$\mathrm{V}_{\mathrm{A}} \tan \theta$$

$$\frac{\mathrm{V}_{\mathrm{A}}}{\tan \theta}$$

$$\frac{\mathrm{V}_{\mathrm{A}}}{\sin \theta}$$

MHT CET 2021 21th September Evening Shift

MCQ (Single Correct Answer)

-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

$$\sin ^{-1}\left(\frac{4}{7}\right)$$

$$\sin ^{-1}\left(\frac{5}{8}\right)$$

$$\sin ^{-1}\left(\frac{8}{9}\right)$$

$$\sin ^{-1}\left(\frac{2}{3}\right)$$

MHT CET 2021 21th September Evening Shift

MCQ (Single Correct Answer)

-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

increase

remain unchanged

become infinite

become zero

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-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

$$\mathrm{An}^2$$

$$\frac{\mathrm{A}}{\mathrm{n}}$$

$$\frac{\mathrm{A}}{\mathrm{n}^2}$$

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