Question

An astronomical telescope has an objective of focal length 100 cm and eyepiece of focal length 5 cm maximum magnification of this telescope is

Answer 1

AN ASTRONOMICAL TELESCOPE HAS AN OBJECTIVE OF FOCAL LENGTH =100 cm

EYE PIECE FOCAL LENGTH =5 CM

5 CM /100 CM = 20 CM

20 CM IS MAXIMUM MAGNIFICATION OF THIS TELESCOPE.

Answer 2

Answer:

The magnification of this telescope is 20.

Explanation:

Given that,

Focal length of telescope = 100 cm

Focal length of eyepiece = 5 cm

Magnification :

The magnification of telescope is equal to the focal length of telescope divided by the focal length of eyepiece.

We need to calculate the magnification of this telescope

Using formula of magnification

$m=\dfrac{f_{o}}{f_{e}}$

Put the value into the formula

$m=\dfrac{100}{5}$

$m=20$

Hence, The magnification of this telescope is 20.