Question

If you want to make a refracting telescope,what component will you choose
a) one convex lens and one concave
b) two convex lenses
c) one concave mirror,one plain mirror and one convex lense
d) one concave mirror,one convex mirror and one convex lens.

Answer 1

Hint: In order to solve the question, we have to suggest that out of all option which object are used to make the refracting telescope there are basically four types of telescope newtonian telescope , refracting telescope, cassegrain reflector telescope and reflecting telescope all of them work differently and all of them use different sets of mirrors , curved surface or lenses.

Complete step by step solution:
A refracting telescope is also known as a refractor telescope. This telescope is a type of optical telescope whose len’s main purpose is to form images. These telescopes are mainly used for astronomical instruments and spy glass along with this telescope can be used for long-focus camera lenses.
For making a refracting telescope we would require two convex by refraction all types of lenses create images and they are made of glass telescope is usually set at the ground level so the surfaces are planes or segments of spheres
parallel light rays will fall on convex lenses from a distant object all of the light rays will bend at a single point known as the focal point.All types of refracting telescopes make use of two main lenses.The larger lens is known as the objective lens while the smaller lens is used for looking at the object. It is also known as the eyepiece lens.

Hence, the correct option is b) two convex lenses.

Note:Many of the people will may confuse between the refracting telescope and reflecting telescope but the refracting telescope also known as refractor uses convex lenses while reflecting telescope also known as reflector uses the collection of curved mirror to reflect and to make image they are used as x-ray telescope .