A contact lens is made of plastic with an index of refraction of 1.30. The lens...

A contact lens is made of plastic with an index of refraction of 1.30. The lens has an outer radius of curvature of +1.96 cm and an inner radius of curvature of +2.56 cm. What is the focal length of the lens?
___cm

Expert Solution

Given that

A contact lens is made of plasticwith an index of refraction of (n) = 1.30.

The lens has an outer radius of curvature of (R₁) = +1.96 cm

And an inner radius of curvature of (R₂) =+2.56cm.

Then the focal length of the lens is given by

1/f = (n-1)[1/R₁ -1/R₂]

=(1.30 -1)[1/1.96 -1/2.56]

=0.03587

Then f= 1/0.03587

=27.878 cm

genius_generous answered 6 months ago

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