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Q. A carrot looks orange in colour because of the $\beta$ carotene molecule in it. This means that the $\beta$ carotene molecule absorbs light of wavelengths

KVPYKVPY 2017

Solution:

Carrot appears orange in white light because it reflects orange portion and absorbs remaining p art of spectrum. Visible p art of spectrum is
image
Clearly, an orange object must absorbs wavelengths shorter than $550\, nm$.