if the power of the lens is 0.5D what will be the focal length of the lens of the spectacles
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When eyes loses it power to accommodate, We call such as eye defects. Spectacles with specific lens can help to overcome these defects! We know that, Focal length of concave lens is negative while focal length of convex lens is positive. So, Given power = - 0.5 d.
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Explanation:
Focal length=
➡P=1/f
➡ -0.5=1/f
➡f=-1/0.5
➡f= -2 m
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