Which of the following statement is correct for ideal \( \mathrm{P}...

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Which of the following statement is correct for ideal
\( \mathrm{P} \) black body:

W
(1) This absorbs visible radiation only.
(2) This absorbs infrared radiation only.
(3) This absorbs half of radiation only and reflected the half.
(4) This totally absorbs heat radiation of all the wavelengths
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