Question

A small telescope has an objective lens of focal length 140 cm and an eyepiece of focal length 5cm what is the magnifing power of the telescope

Answer 1

Step by step explanation

The magnifying power is given by dividing the objective lense focal lenght by the eyepiece focal length.

The objective lense focal length=140cm

and eye piece focal lenth =5cm

hence, Magnifying power=140/5=28.

Answer; 28