Question

make a list of lenses to make a powerful telescope​

Answer 1

Answer:

The basic refracting telescope has two lenses. The first lens is called the objective lens. This lens is a convex lens that bends the incoming light rays to a focal point within the telescope. The second lens is called the eyepiece.By placing an extension tube between the Barlow lens and the eyepiece, you will increase the magnification of a telescope by two three or more times, depending on the size of the extension tube.