Q4 of 33 Page 460

Write true or false for the following statements:

Glass cover in a solar heating device allows the short wavelength of ultraviolet radiations to enter the solar cooker.

True

The glass plate in a solar heating device does not allow the heat to escape. This phenomenon is used in solar cookers as the solar cooker box is covered with a plane glass plate so as to capture more and more ultraviolet rays of the sun and allow maximum heating of the food placed in the box.


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More from this chapter

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2

Write true or false for the following statements:

Reflectors are used in solar heating devices to concentrate the sun heat.

 3

Write true or false for the following statements:

Black surfaces are poor absorbers of heat.

 5

Write true or false for the following statements:

Spherical reflectors are used to obtain high temperatures in solar heating devices.

 6

Write true or false for the following statements:

Solar cells are made of semiconductor materials.