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

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Ram Sharma

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

(A) Increases
(B) Decreases
(C) Remains 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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