Physics · 2026
JEE Main · 23 January 2026, Shift 2 · Q49
The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions 8 cm and 24 cm from the…
The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions $\displaystyle 8$ cm and $\displaystyle 24$ cm from the lens. The focal length of the lens is $\displaystyle \_\_\_\_$ cm .
Official answer
From NTA’s final answer key for this paper.
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.