| 1. | Thermal radiation in visible light can be seen on this hot metalwork.
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| 2. | The light coming from the sun is thermal radiation from the photosphere.
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| 3. | This is now believed to be accounted for by non-uniform thermal radiation.
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| 4. | All matter with a temperature greater than absolute zero emits thermal radiation.
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| 5. | That is, the ionizing radiation and the thermal radiation have changed positions.
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| 6. | They detect thermal radiation and do not need a source of illumination.
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| 7. | Gas and dust in the galaxy emits thermal radiation in the infrared.
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| 8. | As thermodynamical objects with non-zero temperature, black holes should emit thermal radiation.
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| 9. | Some of the Sun's thermal radiation strikes and heats the Earth.
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| 10. | This insight is the root of Kirchhoff's law of thermal radiation.
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