MHT CET 2021 24th September Evening Shift | Ray Optics Question 66 | Physics

A monochromatic ray of light travels through glass slab and water column. The number of waves in glass slab of thickness $$4 \mathrm{~cm}$$ is the same as in water column of height $$5 \mathrm{~cm}$$. If refractive index of glass is $$\frac{5}{3}$$ then refractive index of water is

1.33

1.30

1.25

1.10

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-0

The radii of curvature of both the surfaces of a convex lens of focal length '$$\mathrm{f}$$' and focal power '$$\mathrm{P}$$' are equal. One of the surfaces is made plane by grinding. The new focal length and focal power of the lens is respectively

$$\frac{1}{2}, 2$$

$$2 \mathrm{f}, \frac{\mathrm{P}}{2}$$

$$\sqrt{\frac{2}{f}}, \sqrt{\frac{P}{2}}$$

$$\frac{2 \mathrm{f}}{3}, \frac{2}{3} \mathrm{P}$$

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-0

A glass slab has refractive index '$$\mu$$' with respect to air and the critical angle for a ray of light in going from glass to glass to air is '$$\theta$$' If a ray of light is incident from air on the glass with angle of incidence '$$\theta$$', then the corresponding angle of refraction is

$$\sin ^{-1}\left(\frac{1}{\sqrt{\mu}}\right)$$

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

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

$$90^{\circ}$$

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

-0

'Circle of least confusion' refers to which one of the following defects occurring in images formed by mirrors or lenses?

Distortion

Coma

Astigmatism

Spherical aberration

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