Q34 of 269 Page 141

The radiations present in sunlight which make a solar cooker work are

Infrared radiation, or simply infrared or IR, is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore invisible.

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Solar cells are made of:

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The value of solar constant is

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In order to make an efficient solar cooker, the cover box should be made of :

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The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :