A small circular plate with a surface A 1 can be approximated as a blackbody. A radiometer

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A small circular plate with a surface A1 can be approximated as a blackbody. A radiometer with a surface A2 is placed normal to the direction of viewing from the plate at a distance L. Would the irradiation on the radiometer from the plate decrease if the distance L is doubled, and if so, by how much?

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