Question

What is a optical device which gathers focuses light using mirriors

Answer 1

An optical device that gathers and focuses light using mirrors is called a **telescope**. Specifically, this type of telescope is often referred to as a **reflecting telescope**. Reflecting telescopes utilize one or more mirrors to collect and focus light, allowing for the observation of distant astronomical objects. The most famous example of a reflecting telescope is the Hubble Space Telescope, which uses a large primary mirror to collect light from celestial bodies.