The two lenses of power +3 and -1 diopters are placed in contact. then focal length of the combined lens is
(a) 100Cm
(b) 25 cm
(c) 50 cm
(d) 30.3 cm
Answers
Answered by
3
Answer:
Answer is (a) 100 cm I hope it is correct answer
Answered by
1
Answer:
50cm
Explanation:
Power = +3 + -1 = 2 diopter
P = 1/focal length [in meters]
f = 1/P
f = 1/2
f = 0.5m
f = 50 cm
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