Focal length of the plano–convex lens is ____, when its radius of curvature of the surface is R and is the refractive index of the lens(A) f = R(B) f = \(\frac{R}{2}\)(C) f = \(\frac{R}{(\text{n} -1)}\)(D) f = \(\frac{(\text{n}-1)}{R}\)

Focal length of the plano–convex lens is ____, when its radius of cu

1.	Focal length of the plano–convex lens is ____, when its radius of curvature of the surface is R and is the refractive index of the lens(A) f = R(B) f = \(\frac{R}{2}\)(C) f = \(\frac{R}{(\text{n} -1)}\)(D) f = \(\frac{(\text{n}-1)}{R}\)
Answer» (B) Optic center

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Focal length of the plano–convex lens is ____, when its radius of curvature of the surface is R and is the refractive index of the lens(A) f = R(B) f = \(\frac{R}{2}\)(C) f = \(\frac{R}{(\text{n} -1)}\)(D) f = \(\frac{(\text{n}-1)}{R}\)

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