The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.

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📊 Heat Transfer

Q. The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.

(A) Increases
(B) Decreases
(C) Remain constant
(D) May increase or decrease; depends on the material

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✅ Correct Answer: (D) May increase or decrease; depends on the material

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