Physics · 2025
JEE Main · 24 January 2025, Shift 2 · Q41
A photograph of a landscape is captured by a drone camera at a height of 18 km. The size of the camera film is 2 cm × 2 cm and the area of the…
A photograph of a landscape is captured by a drone camera at a height of $\displaystyle 18$ km. The size of the camera film is $\displaystyle 2$ cm × $\displaystyle 2$ cm and the area of the landscape photographed is $\displaystyle 400 \mathrm{~km}^2$. The focal length of the lens in the drone camera is :
Official answer
From NTA’s final answer key for this paper.
(3)
1.$\displaystyle 8$ cm
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.