Question

Two converging lenses, one with f = 4.0 cm and the other with f = 37 cm , are made into a telescope. What is the length of this telescope?

What is the magnification of this telescope?

Answer 1

The length and the magnification of this telescope are 41 cm and 0.108.

Step-by-step explanation:

Given that,

Focal length of first lens f= 4.0 cm

Focal length of other lens f'= 37 cm

We need to calculate the length of the telescope

Using formula of length

`L=f+f'`

Put the value into the formula

`L=4+37=41 cm`

We need to calculate the magnification of the telescope

Using formula of the magnification

`m=(f)/(f')`

Put the value into the formula

`m=(4)/(37)`

`m=0.108`

Hence, The length and the magnification of this telescope are 41 cm and 0.108.