Question

____ is used to concentrate sunlight to produce heat in solar furnaces ​

Answer 1

Answer:

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A solar furnace is a structure that uses concentrated solar power to produce high temperatures, usually for industry. Parabolic mirrors or heliostats concentrate light (Insolation) onto a focal point. ... It employs an array of plane mirrors to gather sunlight, reflecting it onto a larger curved mirror.......

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Answer 2

Explanation:

Its anwer is concave mirror which is used to concentrate sunlight to produce heat in solar furnaces