Difference between Compound Microscope and Astronomical Telescope - eSaral

S.no

Compound - Microscope

Astronomical - Telescope

1

It is used to increase visual angle of near tiny
object.

It is used to increase the visual angle of
distant large objects.

2

In it field and eye lense both are convergent, of
short focal length and aperture.

In it objective lens is of large focal
length and aperture while eye lens of short focal length and aperture and both are convergent.

3

Final image is inverted. virtual and enlarged and
at a distance $\mathrm{D}$ to $\infty$ from the eye.

Final image is inverted, virtual and
enlarged at a distance $\mathrm{D}$ to $\infty$ from the
eye.

4

MP does not change appreciably if field and eye
lens are interchanged $\left[M P \sim\left(L D / f_{0} f_{e}\right)\right]$

MP becomes $\left(1 / m^{2}\right)$ times of its initial
value if objective and eye-lenses are interchanged as $M P \sim\left[f_{0} / f_{e}\right]$

5

$\mathrm{MP}$ is increased by decreasing the focal length
of both the lenses.

$\mathrm{MP}$ is increased by increasing the
focal length of objective lens (and by decreasing the focal length of eye-piece.

6

$\mathrm{RP}$ is increased by decreasing the wavelength
of light used.

$\mathrm{RP}$ is increased by increasing the
aperture of objective.