the power of convex lens of focal length 25 cm is........
a) +4.0 D
b) 0.25 D
c) -4.0 D
d) -0.4 D
please answer correctly by solving so that i can understand how the ans came and get a brainly mark
Answers
Answered by
3
Answer:
+ 0.4 D
Explanation:
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Answered by
1
Answer:
a) +4.0 D
Explanation:
Power of lens,P=1/f
=1/25cm
(the focal length should be in meter
therefore f=25cm
=.25m)
=1/.25
=4.0D
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