A) 10 diopters
B) \[-10\]diopters
C) 5 diopters
D) \[-\] diopters
Correct Answer: C
Solution :
Here, \[u=-20\,\,cm=-0.2\,\,m\] \[\therefore \] \[P=\frac{1}{f}=\frac{1}{v}-\frac{1}{u}=\frac{1}{-0.2}-\frac{1}{0.1}\] \[=-5+10=5\] Note that since power in diopters is to be calculated, all distance were kept in metres.You need to login to perform this action.
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