Question

56.
An astronomical telescope essentially consists of
(a) two concave lenses
(b) two convex lenses
(c) one concave and one convex lens
(d) two plano-concave lenses
the​

Answer 1

Answer:

two convex lenses an astronomical telescope contain

Answer 2

Answer:

b. two convex lens

Explanation:

to reduce the chromatic and spherical aberrations.