A concave mirror is used in the design of solar furnaces because they converge the parallel sunrays at a point. This helps to increase the temperature of the furnace.
Answer:
Because "a concave mirror converge the parallel sun rays at a point, so high temperature is achieved"
Example:
It is used in the design of solar furnaces, because they converge the parallel sun rays at a point. This helps to increase the temperature of the furnace.
