NEET UG PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Understanding +4 | -1

The length of the optical path of two media in contact of length

d_1

and

d_2

of refractive index

\mu_1

and

\mu_2

respectively, is

View answer and explanation

Correct option: A

\mu_1 d_1+\mu_2 d_2

Option A (

\mu_1 d_1+\mu_2 d_2

) is correct because the optical path length is the product of the refractive index and the geometric distance for each medium, and these are summed for multiple media.

More Questions from RAY OPTICS

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An object 5 cm tall is placed

\mathrm{1}\,\,\mathrm{m}

from a concave spherical mirror which has a radius of curvature of

\mathrm{20}\,\,\,\mathrm{cm}

. The size of the image is Red colour is used for danger signals because A ray of light is incident on the hypotenuse of a right-angled prism after travelling parallel to the base inside the prism. If

\mathrm{\mu }

is the refractive index of the material of the prism, the maximum value of the base angle for which light is totally reflected from the hypotenuse is Statement-A: The minimum distance between an object and its real image formed by a convex lens is

2{f}

.

Statement-B: The distance between an object and its real image is minimum when its magnification is -1. Assertion: We cannot produce a real image by plane or convex mirrors under any circumstances.
Reason: The focal length of a convex mirror is always taken negative. If both the object and image are at infinite distance from a refracting telescope its magnifying power will be equal to