Question

1. Collect the information about the lenses available in an optical shop. Find out how the focal
length of a lens may be determined by the given 'power' of the lens.
Any one send me which is written in a note book as a project please ​

Answer 1

The power of a lens is defined as the reciprocal of its focal length in meters,

$\sf \: or \: D \frac{1}{f} where \: D \: is \: Dioptre$

and focal length is meter

Answer 2

Answer:

Right from childhood, Santosh was not content with a traditional way of life and felt that if she chose a correct and a rational path, the others around her had to change, not she. She wanted to chart her own course in life, rather than following the age-old customs and traditions.