Question

Give reason: large concave mirrors are used in solar furnaces

Answer 1

The light will reflect up and away from the focal point of Concave mirrors are used in solar furnaces, because concave mirrors are the only type of mirror that reflects light in toward a single focal point. A flat mirror does not have a focal point. It does regular reflection off all of its points.
Concave mirrorrs are used in solar furnaces to concentrate a large amount of heat. The shape of concave mirrors catches and directs the sun light inward which .

Answer 2

Answer:

because used as the concentrate the sunlight to heat in solar furnaces