Question

Write a lens formula.

Answer 1

Explanation:

We obtain lens formula by measuring the size of the object without magnification and the magnified size of the same object when a hand lens has been used. Formula is given by (Y/X )x , where x is the unit of magnification. Using a microscope, the magnification formula is given by M1*M2 .

Answer 2

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

f=focal length (m)

v=object distance (m)

u=image distance (m)