Light from a point source in air falls on a convex spherical glas… - Vidyadip

MCQ

Light from a point source in air falls on a convex spherical glass surface $(\mu = 1.5,$ radius of curvature $= 20\, cm)$ The distance of light source from the glass surface is $100\, cm$. At what position is the image formed.......$cm$

A
$50 $
✓
$100 $
C
$150$
D
$40$

✓

Answer

Correct option: B.

$100 $

b
$\frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}$

$\frac{1.5}{v}+\frac{1}{100}=\frac{1.5-1}{20}$

$\mathrm{v}=+100 \mathrm{\,cm}$

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