Question

Find the focal length of the lens whose power is positive 0.5 doctor also write the nature and type of lens

Answer 1

focal length is +2 which is convex lens converging nature



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Answer 2

GIVEN:

          P = 1/F = 0.5

          1/F = 0.5

          F = 1/0.5

          F = 2

The focal length of the lens is 2

As the focal length and power is positive. The lens is convex lens and the person is suffering from hypermetropia