Q: Which one among the following is the correct focal length of a combination of lenses of power 2.5 D and -2.0 D?
(a)+0.5 m
(b)-0.5 m
(c)+2.0 m
(d)-2.0 m
Correct Answer: (c)
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Q: Which one among the following is the correct focal length of a combination of lenses of power 2.5 D and -2.0 D?
Correct Answer: (c)