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QJEEM22Ph5c5a: JEE Main 2022 Physics - Class 12 JEEM22Ph5c5a Solution: An object 'O' is placed at a distance of in front of a concave…

An object 'O' is placed at a distance of 100 cm100 \mathrm{~cm} in front of a concave mirror of radius of curvature 200 cm200 \mathrm{~cm} as shown in the figure. The object starts moving towards the mirror at a speed 2 cm/s2 \mathrm{~cm} / \mathrm{s} . The position of the image from the mirror after 10 s10 \mathrm{~s} will be at _________ cm\mathrm{cm} .

JEE Main 2022 (Online) 28th July Evening Shift Physics - Geometrical Optics Question 79 English

Step-by-Step Verified Solution

The object after 10 second will be at u=−80u = - 80 cm.

So 1v−180=−1100{1 \over v} - {1 \over {80}} = - {1 \over {100}}

⇒v=8000+20=400\Rightarrow v = {{8000} \over { + 20}} = 400 cm

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