Question

If you build a telescope with a focal length of 2.2 m, what eyepiece focal length (in m) is needed for a magnification of 100 times?

Answer 1

0.022 m

Step-by-step explanation:

The magnification of a telescope is given by the formula:

magnification = focal length of telescope / focal length of eyepiece

We are given the focal length of the telescope (2.2 m) and the desired magnification (100 times). We can rearrange the formula to solve for the focal length of the eyepiece:

focal length of eyepiece = focal length of telescope / magnification

focal length of eyepiece = 2.2 m / 100 = 0.022 m

Therefore, the eyepiece focal length needed for a magnification of 100 times is 0.022 m