NEET UG PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Analyzing +4 | -1

Assertion (A): A ray of light travels from first medium to second medium. In first medium angle of ray with normal is

i_1=30^{\circ}

and in second medium

i_2=60^{\circ}

. Then second medium is rarer medium

Reason (R): Refractive index of frist medium with respect to second medium is

\frac{\sin 30^{\circ}}{\sin 60^{\circ}}

View answer and explanation

Correct option: C

If assertion is true but reason is false.

Option C (If assertion is true but reason is false) is correct because the assertion is true (second medium is rarer) but the reason calculates the refractive index incorrectly.

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