Question

Mirrors used in astronomical telescopes are

Answer 1

concave mirror - First Surface Mirror

Explanation:

Answer 2

Early telescopes focused light using pieces of curved, clear glass, called lenses. However, most telescopes today use curved mirrors to gather light from the night sky. The shape of the mirror or lens in a telescope concentrates light. That light is what we see when we look into a telescope. A telescope is a tool that astronomers use to see faraway objects. Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky. The mirrors or lenses in a telescope are called the “optics”. Those are concave mirror