Physics · 2022
JEE Main · 25 July 2022, Shift 2 · Q59
A convex lens of focal length 20 cm is placed in front of a convex mirror with principal axis coinciding each other. The distance between the lens…
A convex lens of focal length $\displaystyle 20$ cm is placed in front of a convex mirror with principal axis coinciding each other. The distance between the lens and mirror is $\displaystyle 10$ cm . A point object is placed on principal axis at a distance of $\displaystyle 60$ cm from the convex lens. The image formed by combination coincides the object itself. The focal length of the convex mirror is
\_\_\_\_ cm.
Official answer
10
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.