Answers

  • qais
  • Content Quality
2016-01-14T12:02:04+05:30
Power = 1/f
f= 1/(-2) = - 0.5
as power is negative so the focal length also negative.
focal length is negative for concave lens only.
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2016-01-14T13:45:46+05:30
As p=1/f
F=1/p
f=1/-2.0
f=-0.5m
as focal length is negative it is a concave lens
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