In a solar cooker the following arrangements are made write one function of each arrangement.
a) The box is made of insulating material such as plastic or wood.
b) The inner walls of the box are painted black.
c) The box is covered with a transparent glass sheet.
d) A plane mirror is hinged ate an angle at the top of the box.
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(a) To avoid loss of heat from solar cooker to the surroundings. Wood is an insulator of heat.
(b) Black surface absorbs more heat radiations than a white surface
(c) Transparent glass sheet does not allow the heat radiation to go outside the box.
(d) focusing the mirrors to the rays of the sun will increase the amount of heat energy .
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