The magnifying power of an refracting type of astronomical telescope is 'm'. If focal length of the eyepiece…
The magnifying power of an refracting type of astronomical telescope is 'm'. If focal
length of the eyepiece is doubled, the magnifying power will become
$\frac{\text { m }}{4}$
$\frac{m}{2}$
$2 \mathrm{~m}$
$\mathrm{m}$
Solution
The magnifying power $\mathrm{m}=\frac{\mathrm{f}_{0}}{\mathrm{f}_{\mathrm{e}}}$
If $\mathrm{f}_{\mathrm{e}}$ is doubled, the magnifying power becomes half.