PYQ Adv 2023 P1 Q9

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Santosh Sir IITK (Apex Physics)

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Published on April 15, 2024 10:30:20 AM ● Video Link: https://www.youtube.com/watch?v=zjDDOTa-v1E

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An optical arrangement consists of two concave mirrors M1 and M2, and a convex lens L with a common principal axis, as shown in the figure. The focal length of L is 10 cm. The radii of curvature of M1 and M2 are 20 cm and 24 cm, respectively. The distance between L and M2 is 20 cm. A point object S is placed at the mid-point between L and M2 on the axis. When the distance between L and M1 is 𝑛/7 cm, one of the images coincides with S. The value of 𝑛 is _______.


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