with the help of labelled diagram explain the construction and working of cassgrian reflecting telescope. write an expression for it's magnifiying power
Answers
Explanation:
The Cassegrain telescope is an astronomical reflecting telescope, in which the light is incident on a large concave paraboloid mirror, and reflected onto a smaller convex hyperboloid mirror. This reflected light is reflected again through a hole in the concave mirror to finally form the image.
The classic Cassegrain telescope consists of a parabolic reflector (primary mirror) and a hyperbolic mirror (secondary mirror). The parabolic shape of the mirror helps in gathering light, similar to the way that a refractor gathers light using an objective lens. The hyperbolic secondary mirror reflects light, such that it is focussed onto the hole in the primary mirror. The eyepiece and the other instruments are located behind the telescope. The folded optical path in this telescope makes it compact and portable.
Given below are some of the main applications of Cassegrain telescopes:
In astronomical observatories
Photographic observations
