alleryThe role of the glass sheet in a solar cooker is to:
ATrap heat by greenhouse effect
BReflect sunlight away
CReduce dust
DMake the cooker waterproof
Answer & Solution
Correct answer: A. Trap heat by greenhouse effect
1. The glass sheet covers the top of the solar cooker.
2. Sunlight passes through the glass and is absorbed inside.
3. The absorbed energy is re-emitted as longer-wavelength infrared radiation.
4. The glass blocks the outgoing infrared, trapping the heat (greenhouse effect).
5. So the glass sheet retains heat inside the cooker.
_Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_
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