A) \[25\,\,cm\]
B) \[50\,\,cm\]
C) \[100\,\,cm\]
D) \[10\,\,cm\]
Correct Answer: B
Solution :
Key Idea: Image is formed at focus. We know that Power \[(P)=\frac{1}{focal\,\,length\,\,(m)}\] Given \[P=-2D\] \[\therefore \]Focal length\[=-\frac{1}{2}=-0.5\,\,m\] \[\Rightarrow \] \[F=-50\,\,cm\] Hence, maximum distance of an object, which he can see without spectacles is\[50\,\,cm\].You need to login to perform this action.
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