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A solar cooker uses a black painted box because black:
ACools quickly across all cases
BReflects sunlight efficiently
CIs fashionable
DAbsorbs heat better than any other colour
Answer & Solution
Correct answer: D. Absorbs heat better than any other colour
1. Different colours absorb sunlight differently.
2. Black surfaces absorb almost all incident wavelengths.
3. Absorbed sunlight is converted to heat.
4. The black box therefore heats up faster and more strongly.
5. So black paint maximises heat absorption.
_Source: NCERT Class 10 Science Ch 14 'Sources of Energy' (byjus.com extract)_
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