1.

Doctor suggest a lens of power -0.5D to a person, Calculate focal length of lens, name the types of lens.​

Answer»

Answer:

it is a concave LENS, because power, radius of CURVATURE , and focal length of concave lens MEASURED in negative form.

Explanation:

we know that,

Power = 1/f(in METERS)

-0.5 = 1/f

f = -1/0.5

f = -2 m



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