A) 1 D
B) -1 D
C) 25 D
D) - 25 D
Correct Answer: A
Solution :
By lens maker formula, \[\frac{1}{{{f}_{a}}}=(\mu -1)\,\left( \frac{1}{{{R}_{1}}}-\frac{1}{{{R}_{2}}} \right)=(1.5-1)\left( \frac{1}{{{R}_{1}}}-\frac{1}{{{R}_{2}}} \right)\] ...(i) and ?(ii) Thus, \[{{f}_{m}}=-8\times {{f}_{a}}=-8\,\times \,\frac{-1}{5}\] \[{{P}_{m}}=\frac{\mu }{{{f}_{m}}}\,=\frac{1.6}{1.6}\,=1\,D\]You need to login to perform this action.
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