Question

concave mirror, convex mirror, convex lens is the correct combination of mirrors and lens used in the Cassegrain telescope. true or false​

Answer 1

Answer:

it is true

Explanation:

because The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture. This design puts the focal point at a convenient location behind the primary mirror and the convex secondary adds a telephoto effect creating a much longer focal length in a mechanically short system