A person ${\rm{6}}\,\,{\rm{feet}}$ in length can see his full size erect image in a mirror ${\rm{2}}\,\,{\rm{feet}}$ in length. This mirror has to be

NEET UG PHYSICS MCQ: RAY OPTICS

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Analyzing +4 | -1

A person

\mathrm{6}\,\,\mathrm{feet}

in length can see his full size erect image in a mirror

\mathrm{2}\,\,\mathrm{feet}

in length. This mirror has to be

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Correct option: C

Necessarily convex

Option D (Necessarily concave) is correct because only concave mirrors can form an erect and magnified image when the object is placed between the pole and the focus. The question is flawed and should be concave.

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