Q2 of 33 Page 460

Write true or false for the following statements:

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

True

Solar heating devices as the name suggest are devices which use solar energy for heating a substance. While constructing the solar heating devices, reflectors are used to concentrate the sun heat to a single point for getting better results.


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15

The average amount of energy released during the fission of uranium atom is:

 1

Write true or false for the following statements:

Solar energy has the greatest potential of all the renewable sources of energies.

 3

Write true or false for the following statements:

Black surfaces are poor absorbers of heat.

 4

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.