Which of the following solar heating devices gives higher temperature?
(a) solar heating device with flat reflector.
(b) solar heating device with parabolic reflector.

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Solution

(a) Solar heating device with flat reflector:
A flat mirror reflector is used in devices where moderately high temperature is to be produced.
(b) Solar heating device with parabolic reflector:
spherical/parabolic mirror reflector is used in devices where a much higher temperature is to be produced.
Therefore, a solar heating device with a parabolic reflector gives a higher temperature than a solar heating device with a flat reflector.

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