Question

Write maximum and minimum values of magnifying power of a simple microscope.​

Answer 1

Maximum value of magnifying power of simple microscope is $\bold{\huge{ 1+\frac{D}{f} }}$ and minimum value is $\bold{\huge{\frac{D}{f} }}$.

Explanation:

Magnifying power for simple microscope is $\bold{M = \frac{D}{u} }$.

• Maximum magnifying power: For a simple microscope magnifying power is maximum when image is formed at least distance of distinct vision i.e. u = D. Using lens formula we will get,

                                               $\bold{ M = 1+\frac{D}{f} }$

       which is maximum value of magnifying power of a simple microscope.

• Minimum magnifying power: For minimum magnification image will formed at infinity, i.e. $v = \infty$. Here using lens formula we get,

                                               $\bold{ M = \frac{D}{f} }$

        which is minimum value of magnifying power of simple microscope.