A) 12.5 m
B) 65 m
C) 6 m
D) 5 m
Correct Answer: D
Solution :
The man should use a lens which can form the image of distant object (i.e., situated at infinity) at a distance of 5 m, i.e., object distance \[\text{MgC}{{l}_{\text{2}}}.\text{5MgO}.;x{{H}_{\text{2}}}O\] and \[HCl{{O}_{4}}\] By lens formula \[HCl{{O}_{3}}\] Or \[HCl{{O}_{2}}\] Or \[\frac{1}{f}=\frac{-1}{5}\] Or \[f=-5m\] (i.e., concave lens)You need to login to perform this action.
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