Ray optics

Question

If the focal length of objective lens is increased then magnifying power of

Easy

Solution

$\text{Magnifying power of a microscope,}m=\left(\frac{L}{{f}_{o}}\right)\left(\frac{D}{{f}_{e}}\right)$

where ${f}_{0}$ and ${f}_{e}$ are the focal lengths of the objective and eyepiece respectively and L is the distance between their focal points and D is the least distance of distinct vision. If ${f}_{0}$ increases, then m will decrease.

$\text{Magnifying power of a telescope,}m=\frac{{f}_{0}}{{f}_{e}}$

where ${f}_{0}$ and ${f}_{e}$ are the focal lengths of the objective and eyepiece respectively. If ${f}_{0}$ increases, then m will increase.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Download Now