The magnifying power of a refracting type of astronomical telescope is ' $\mathrm{m}$ '. If focal length of…
The magnifying power of a refracting type of astronomical telescope is ' $\mathrm{m}$ '. If focal length of eyepiece is doubled then the magnifying power will become
$\mathrm{m}$
$2 \mathrm{~m}$
$\frac{\mathrm{m}}{2}$
$\frac{\mathrm{m}}{4}$
Solution
Magnifying power, $m=\frac{f_o}{f_e}$
If $\mathrm{f}_{\mathrm{e}}$ is doubled, the magnifying power will become $\frac{\mathrm{m}}{2}$