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Hot bodies emit a specific type of radiation. What are they called?

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Hot bodies emit a specific type of radiation. What are they called?

(a) X-rays

(b) Black-body radiation

(c) Gamma radiations

(d) Visible light

I have been asked this question during an online interview.

I would like to ask this question from Mechanism of Light Emission in section Optics of Engineering Physics II

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The correct answer is (b) Black-body radiation

The best I can explain: The phenomenon of black—body radiations was given by Max Planck. He stated that hot bodies emit radiation over a wide range of wavelengths. An ideal body is the one that emits and absorbs radiation of all frequencies. Such a body called a Black Body and the radiations are called Black body radiations.

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