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Carbon Cycle

nbsp;Why glas...

Question

Why glasses and greenhouse gases don't allow the infra-ray-radiation to go out .

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Solution

The wavelength of infrared light is long and possess low energy. When this light enters through glass, its wavelength decreases and there is increase in energy. This radiation of light with new wavelength is not able to escape through glass thereby causing the heating of inner surface.

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Q. Select the correct statements about greenhouse gases:

A. Carbon dioxide is the only gas in the atmosphere which causes global warming.
B. The greenhouse gases trap heat and do not allow heat to escape into outer space.
C. Water vapours do not contribute to the greenhouse effect.
D. The presence of excessive greenhouse gases in the atmosphere is responsible for global warming.

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