A Plano-convex lens is made of glass with a refractive index of 1.5. T

1.	A Plano-convex lens is made of glass with a refractive index of 1.5. The radius of curvature of the convex surface is 25cm. Calculate the focal length of the lens.
Answer» Given, Radius of curvature, r = 25 cm Refractive index, u = 1.5 Focal length of lens, f = \(\frac{R}{\mu - 1}=\frac{25}{1.5-1}= 2\times25\) = 50 cm

A Plano-convex lens is made of glass with a refractive index of 1.5. The radius of curvature of the convex surface is 25cm. Calculate the focal length of the lens.

Answer»

Given,

Radius of curvature, r = 25 cm

Refractive index, u = 1.5

Focal length of lens,

f = \(\frac{R}{\mu - 1}=\frac{25}{1.5-1}= 2\times25\)

= 50 cm

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A Plano-convex lens is made of glass with a refractive index of 1.5. The radius of curvature of the convex surface is 25cm. Calculate the focal length of the lens.

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