How do solar heating devices with flat reflector differ from those with spherical reflectors?

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Solution

The flat and spherical reflectors are used to collect all the radiation from the Sun at one place, but there are some major differences between these two types of reflectors. The differences are listed below.
S.No. Flat Reflectors Spherical Reflector
1. The surface of this type of reflector is plane, and it can be inclined at any desired angle. The surface of this type of reflector is spherical in shape.
2. The radiations are collected in a particular area. The radiations are collected at a particular point.
3. The range of temperature is from 120℃ to 140℃. The range of temperature is from 1000℃ to 3000℃.

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500^{o} C

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S.No.	Flat Reflectors	Spherical Reflector
1.	The surface of this type of reflector is plane, and it can be inclined at any desired angle.	The surface of this type of reflector is spherical in shape.
2.	The radiations are collected in a particular area.	The radiations are collected at a particular point.
3.	The range of temperature is from 120℃ to 140℃.	The range of temperature is from 1000℃ to 3000℃.