In front of the mirror
In front of the mirror
The telescope is cylindrical. Its primary mirror is concave.
mirror with a concave parabolic figure
A reflecting telescope.
a concave mirror and an angled plane mirror
Concave mirror of a reflecting telescope
A reflecting telescope is different from a refracting telescope because a reflecting telescope uses a concave lens, a plane mirror, and a convex lens. While a refracting telescope uses two lens.
a. concave mirror b. a convex lens c. a plane mirror or d. all the above.
Concave means bulging inward - reflecting telescopes use this sort of mirror. The first telescope designed to use one was invented by Isaac Newton and they are therefore called "Newtonian" telescopes.
The size of a reflecting telescope is typically indicated by its aperture, which is the diameter of the primary mirror. Aperture size plays a crucial role in determining the light-gathering ability and resolving power of the telescope.
A reflecting telescope only uses lenses in the eyepiece. Light is picked up and an image produced by using a concave parabolic mirror.
Refracting