A thin cylindrical rod of length 10 ~cm is placed horizontally on the principle axis of a concave mirror of focal length 20 ~cm. The rod is placed in a such a way that mid point of the rod is at 40 ~cm from the pole of mirror. The length of the image formed by the mirror will be x/3 ~cm. The value of x is _ _ _ _ _ _ _.

Optics: JEE Main 2023 Physics question

JEE Main 2023 · 1 Feb, Morning shift · Q59

JEE Main 20231 Feb, Morning shiftPhysicsHardOptics190× since 2002

A thin cylindrical rod of length

10 \mathrm{~cm}

is placed horizontally on the principle axis of a concave mirror of focal length

20 \mathrm{~cm}

. The rod is placed in a such a way that mid point of the rod is at

40 \mathrm{~cm}

from the pole of mirror. The length of the image formed by the mirror will be

\frac{x}{3} \mathrm{~cm}

. The value of

x

is _____________.

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2023 Optics Question with Answer (1 Feb Morning shift, Q59) | JEE Arc