CUET · PHYSICS · PYQ PAPER 2025
Light from a point source in the air falls on a convex spherical glass surface having radius of curvature 20 cm and refractive index 1.5. The distance of the light source from the glass surface is 100 cm. The distance of the image from the glass surface is:
- A 50 cm
- B 70 cm
- C 100 cm
- D 200 cm
Answer & Solution
Correct Answer
(C) 100 cm
Step-by-step Solution
Detailed explanation
\( \frac{n_2}{v} - \frac{n_1}{u} = \frac{n_2 - n_1}{R} \) \( \frac{1.5}{v} - \frac{1}{-100} = \frac{1.5 - 1}{+20} \) \( \frac{1.5}{v} + \frac{1}{100} = \frac{0.5}{20} \) \( \frac{1.5}{v} = \frac{1}{40} - \frac{1}{100} \) \( \frac{1.5}{v} = \frac{5 - 2}{200} = \frac{3}{200} \)…
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