(6) (3 points.) An iron rod is heated by a welder's torch. Initially it glows a...

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(6) (3 points.) An iron rod is heated by a welder's torch. Initially it glows a dull red, then a brighter orange, and finally very bright white. Discuss this sequence in terms of blackbody radiation. (7) (3 points.) Does the Doppler effect depend on the distance between the source of light and the observer? (Assume the direction of motion is purely radial: directly toward or away from the observer.) Explain. (6) (3 points.) An iron rod is heated by a welder's torch. Initially it glows a dull red, then a brighter orange, and finally very bright white. Discuss this sequence in terms of blackbody radiation. (7) (3 points.) Does the Doppler effect depend on the distance between the source of light and the observer? (Assume the direction of motion is purely radial: directly toward or away from the observer.) Explain.

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Answer of 1st question When the iron is heated it first reaches a temperature that emits infrared ra... View the full answer