To increase the efficiency of a solar cooker, which of the following methods can be implemented?

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Painting it with black paint

Using a glass sheet as a cover

Using a plane mirror as a reflector

All of these

answer is D.

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Detailed Solution

The correct option is

4

.
A solar cooker is a device used for preparing food. It is a type of solar thermal collector. It traps the Sun's thermal energy. Heat is produced when (high-frequency light) white light is converted into (low-frequency) infrared radiation.
The efficiency of the solar cooker can be increased by implementing the following mentioned ways:
●       The insulating box is painted black to trap the maximum amount of sunlight.
●       A glass sheet covers the top portion to avoid escaping the heat inside the box.
●       The inclined plane mirror is used as the reflector to trap the solar energy to the maximum.

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