Question by Naomi♥: *multiple choice* What is the primary function of the clear glass of a greenhouse?
1) The glass reduces the amount of insolation entering the greenhouse.
2) The glass allows all wavelengths of radiation to enter and all wavelengths of radiation
to escape.
3) The glass allows short wavelengths of radiation to enter, but reduces the amount of
long-wavelength radiation that escapes.
4) The glass allows long wavelengths of radiation to enter, but reduces the amount of
short-wavelength radiation that escapes.
This is a multiple choice question.
Best answer:
Answer by Earth Man
(3) Everything enters, but long-wavelength infrared (IR) doesn’t escape. Infrared wavelength radiation is thermal energy, which is heat, which is why greenhouses are warm, which is why you grow plants in them all year round.
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