A) +20
B) -20
C) +200
D) -200
Correct Answer: B
Solution :
As magnifying power \[M=\frac{{{f}_{o}}}{{{f}_{e}}}\] (for telescope) To produce largest magnification \[{{f}_{o}}>{{f}_{e}}\] Also, \[{{f}_{o}}\,and\,\,{{f}_{e}}\] should be positive \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{f}_{e}}\,\,=\,\,+\,\,15\,cm\]You need to login to perform this action.
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