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STD 11 - 10.2. transmission of heat — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 10.2. transmission of heat4 Marks
Question
Certain substance emits only the wavelengths ${\lambda _1},\;{\lambda _2},\;{\lambda _3}$ and ${\lambda _4}$ when it is at a high temperature. When this substance is at a colder temperature, it will absorb only the following wavelengths
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Answer

(d)According to Kirchoff’s law in spectroscopy.

If a substance emit certain wavelengths at high temperature, it absorbs the same wavelength at comparatively lower temperature.

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