[" 65.To correct myopia,one should use "],[" 1.Concave lenses "2" .Convex lenses "],[" 3.Plane glass plates "4" .Conver glass plates "]

[" A spherical bubble in "],[" water will act as "],[" Convex lens "],[" O concave lens "],[" Plane glass plate "],[" Plano-concave lens "]

What is the ‘power’ of plane glass plate ?

The power of a plane glass plate is ……………………………….

The focal length of a plane glass plate is infinite and its power is zero.

Where should an object be placed in order of to use a convex lens as a magnifying glass?

Find focal lengths of lenses made of glass (mu=3//2) and placed in air.

Find focal lengths of lenses made of glass (mu=3//2) and placed in air.