Lens maker formula & power

(b) Write the Lens Maker's formula and use it to obtain the range of mu (The refractive index of the material of the lens) for which the focal length of and equiconvex lens, kept in air, would have a greater magnitude than that of the radius of curvature of its two surfaces.

Write the basic assumptions used in the derivation of lens – maker’s formula and hence derive this expression.

Starting with an expression for refraction at a single spherical surface, obtain Lens Maker.s formula.

Pace maker is

Define one dioptre of power of a lens.

A focal length of a lens 10cm. What is power of a lens in dipotre?

Empirical formula of Bleaching power is :-

The angular magnification of a simple microscope can be increased by increasing :- 1 focal length of lens 2 size of object 3 aperture of lens 4 power of lens

Find the focal length and nature of a lens whose optical power is -5D.