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7 December, 03:48

An incandescent lightbulb emits 96 W of radiation. If the filanent is at a temperature of 3242 K, what is the area of the filament

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  1. 7 December, 06:46
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    1.53 x 10^-5 m^2

    Explanation:

    use the Stefan's law

    Energy per unit time = σ x A x T^4

    σ = 5.67 x 10 - 8 W/m^2 K^4

    96 = 5.67 x 10^-8 x A x (3242) ^4

    A = 1.53 x 10^-5 m^2
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