MCQ
Find Image distance....$cm$
- ✓$+50$
- B$-50$
- C$+10$
- D$-10 $
✓
Answer
Correct option: A.
$+50$
a
For refraction through spherical surface,
For refraction through spherical surface,
$\frac{\mathrm{n}_{2}}{\mathrm{v}}-\frac{\mathrm{n}_{1}}{\mathrm{u}}=\frac{\mathrm{n}_{2}-\mathrm{n}_{1}}{\mathrm{R}} \Rightarrow \frac{3}{2 \mathrm{v}}-\frac{1}{-50}=\frac{3 / 2-1}{+10}$
$\Rightarrow \frac{3}{2 v}=\frac{1}{20}-\frac{1}{50}=\frac{3}{100}$
$\therefore \mathrm{v}=50 \mathrm{\,cm}$
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