A refracting telescope consists of

Options

A. a one concave mirror and one convex lens
B. b two convex lenses of equal focal length
C. c two concave mirrors of different focal lengths
D. d two convex lenses of unequal focal lengths

Answer

D

Explanation

A refracting or refractor telescope is a type of optical
telescope that uses a lens as its objective to form an
image (alsao referred to a dioptric telescope). All
refracting telescopes use the same principles. The
combination of an objective lens 1 and some type of
eyepiece 2 is used to gather more light than the human
eye is able to collect on its own, focus it 5, and present
the viewer with a brighter, clearer, and magnigied virtual
image 6.