Physics · 2019
JEE Main · 11 January 2019, Shift 1 · Q23
An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If the object moves away from the…
An object is at a distance of $\displaystyle 20$ m from a convex lens of focal length $\displaystyle 0.3$ m. The lens forms an image of the object. If the object moves away from the lens at a speed of $\displaystyle 5$ m/s, the speed and direction of the image will be :
Official answer
(2)
$\displaystyle 1.16 \times 10^{-3} \mathrm{~m} / \mathrm{s} \text { towards the lens }$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.