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JEE Advanced 2025 Paper 2

Section: Physics

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Question : 22 of 48

Marks: +1, -0

Two identical concave mirrors each of focal length f are facing each other as shown in the schematic diagram. The focal length f is much larger than the size of the mirrors. A glass slab of thickness t and refractive index n0 is kept equidistant from the mirrors and perpendicular to their common principal axis. A monochromatic point light source S is embedded at the center of the slab on the principal axis, as shown in the schematic diagram. For the image to be formed on S itself, which of the following distances between the two mirrors is/are correct?

[JEE Adv 2025 P2]

4f+(1−‌
1
n0
)t
2f+(1−‌
1
n0
)t
4f+(n0−1)t
2f+(n0−1)t

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