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A surface absorbs 10% of radiation at wavelengths less than 3 μm and 50% of radiation at wavelengths greater than 3 μm. If F1 = 0.890029, the average absorptivity of this surface for radiation emitted by a source at 3000 K is ____. (Answer up to two decimal places)
    Correct answer is '0.14'. Can you explain this answer?
    Most Upvoted Answer
    A surface absorbs 10% of radiation at wavelengths less than 3 μm an...
    We have
    α1 = 0.1, α2 = 0.5, T = 3000 K, λ = 3 μm
    So, λT = 3 x 3000
    = 9000 μm-K
    The radiation fraction corresponding to λT = 9000 is F1 = 0.890029
    Thus average absorptivity is
    Αavg = F1α1 + (1 - F12
    = (0.890029)(0.1) + (1 - 0.890029)0.5
    = 0.14
    The radiation fraction correspond to λT = 9000 μm-K is 0.890029
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    Community Answer
    A surface absorbs 10% of radiation at wavelengths less than 3 μm an...
    Micrometers and reflects 90% of radiation at wavelengths greater than 3 micrometers.
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    A surface absorbs 10% of radiation at wavelengths less than 3 μm and 50% of radiation at wavelengths greater than 3 μm. If F1 = 0.890029, the average absorptivity of this surface for radiation emitted by a source at 3000 K is ____. (Answer up to two decimal places)Correct answer is '0.14'. Can you explain this answer?
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    A surface absorbs 10% of radiation at wavelengths less than 3 μm and 50% of radiation at wavelengths greater than 3 μm. If F1 = 0.890029, the average absorptivity of this surface for radiation emitted by a source at 3000 K is ____. (Answer up to two decimal places)Correct answer is '0.14'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A surface absorbs 10% of radiation at wavelengths less than 3 μm and 50% of radiation at wavelengths greater than 3 μm. If F1 = 0.890029, the average absorptivity of this surface for radiation emitted by a source at 3000 K is ____. (Answer up to two decimal places)Correct answer is '0.14'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A surface absorbs 10% of radiation at wavelengths less than 3 μm and 50% of radiation at wavelengths greater than 3 μm. If F1 = 0.890029, the average absorptivity of this surface for radiation emitted by a source at 3000 K is ____. (Answer up to two decimal places)Correct answer is '0.14'. Can you explain this answer?.
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