CUET · PHYSICS · PYQ PAPER 2023
Light from a point source in air falls on spherical glass surface (n = 1.4 and radius of curvature 20 cm). The distance of light source from the glass surface is 150 cm, At what position is the image formed?
- A 150 cm from glass surface in the direction of incident light
- B 105 cm from glass surface in the direction of incident light
- C 150 cm from glass surface towards light source
- D 105 cm from glass surface towards light source
Answer & Solution
Correct Answer
(B) 105 cm from glass surface in the direction of incident light
Step-by-step Solution
Detailed explanation
\( \frac{n_2}{v} - \frac{n_1}{u} = \frac{n_2 - n_1}{R} \) \( \frac{1.4}{v} - \frac{1}{-150} = \frac{1.4 - 1}{+20} \) \( \frac{1.4}{v} + \frac{1}{150} = \frac{0.4}{20} \) \( \frac{1.4}{v} = \frac{1}{50} - \frac{1}{150} = \frac{3-1}{150} = \frac{2}{150} \)…
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