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Geometrical Optics question

2025 · 23 Jan · Shift 2 · Q61
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  5. /2025 · 23 Jan · Shift 2 · Q61

Geometrical Optics question

2025 · 23 Jan · Shift 2 · Q61

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
A concave mirror of focal length fff in air is dipped in a liquid of refractive index μ\muμ. Its focal length in the liquid will be:
  1. A
    μf\mu fμf
  2. B
    fff
  3. C
    fμ\frac{f}{\mu}μf​
  4. D
    f(μ−1)\frac{f}{(\mu-1)}(μ−1)f​
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