A) 10cm
B) 15cm
C) 50 cm
D) None of these
Correct Answer: A
Solution :
| Considering refraction at the curved surface, |
| \[u=-20,\,\,\,\,{{\mu }_{2}}=1\] |
| \[{{\mu }_{1}}=3/2,\,\,\,R=+20\] |
| Applying \[\frac{{{\mu }_{2}}}{\text{v}}-\frac{{{\mu }_{1}}}{u}=\frac{{{\mu }_{2}}-{{\mu }_{1}}}{R}\] |
| \[\Rightarrow \,\,\frac{1}{\text{v}}-\frac{3/2}{-20}=\frac{1-3/2}{20}\Rightarrow \text{v=-10}\] |
| i.e., 10 cm below the curved surface or 10 cm above the actual position of flower. |
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