(i) If f=+0.5 m then what is the power of the lens?(ii) The curvature of the two faces of a biconvex lens is...

What is the power of a lens ?

(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 ? (iii) A convex lens has 20 cm focal length in air. What is the focal length in water ? (Refractive index of air-water = 1.33 , refractive index of air-glass = 1.5 ).

If for a lens, F=-20 cm, what is the power of the lens ?

What is the unit of Power of a lens?

What is the formula for power of a lens ?

The power of a lens is -4.0 D. what is the nature of the lens?

what is the power of a convex lens having focal length 0.5 m ?