A telescope that uses mirrors is called a reflecting telescope - Deepstash
A telescope that uses mirrors is called a reflecting telescope

A telescope that uses mirrors is called a reflecting telescope

A mirror can be very thin and a bigger mirror does not have to be thicker. Light is concentrated by bouncing off of the mirror that needs to be the correct curved shape.

Mirrors have their own problems. For example, the curved mirror in a telescope flips the image. It can be fixed by using other mirrors to flip it back.

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