If R1 and R2 are the radii of curvature of a double convex lens. The largest power will be for

If R_1 and R_2 are the radii of curvature of a double convex lens, the largest power will be when

If R_(1) and R_(2) are the radii of curvature of double convex lens made of same material, the lens with more focal length is

Radii of curvatures (R)

(i) If f = + 0.5 m , what is the power of the lens ? (ii) The radii of curvature of the faces of a double convex lens are 9 cm and 15 cm . Its focal length is 12 cm . What is the refractive index of glass ?

The radii of curvature of the faces of a double convex lens are 10 cm and 20. The refractive index of the glass is 1.5. What is the power of this lens (in units of dioptre)?

If R_(1)andR_(2) are the radii of curvature of the spherical surfaces of a thin lens and R_(1)gtR_(2) , then this lens can

If R_(1)andR_(2) are the radii of curvature of the spherical surfaces of a thin lens and R_(1)gtR_(2) , then this lens can