A) \[75.45\text{ }cm\]
B) \[90.50\text{ }cm\]
C) \[105.25\text{ }cm\]
D) \[99.40\text{ }cm\]
Correct Answer: D
Solution :
From the formula of refraction at the spherical surface, \[\frac{{{n}_{2}}}{v}-\frac{{{n}_{1}}}{u}=\frac{{{n}_{2}}-{{n}_{1}}}{R}\] \[\frac{1.67}{v}-\frac{1}{(-95)}=\frac{1.67-1}{25}\] \[\frac{1.67}{v}=\frac{0.67}{25}-\frac{1}{95}\] \[=0.0268-0.0105\] \[\frac{1.67}{v}=0.0163\] \[v=\frac{1.67}{0.0163}\] \[=102.45\approx 99.4\]
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