emissivity tables - ultraviolet catastrophe good links

https://isequaltoklassesnavneet.blogspot.com/2021/02/good-videos-on-blackbody-radiation-wein.html

https://www.thermoworks.com/emissivity-table


https://www.nuclear-power.net/nuclear-engineering/heat-transfer/radiation-heat-transfer/ultraviolet-catastrophe-rayleigh-jeans-catastrophe/

 
Why are hot things colored? (incandescence)
http://www.webexhibits.org/causesofcolor/3.html
Physics Explained
 https://youtu.be/rCfPQLVzus4

Lighting Affects Color
https://www.extremetech.com/extreme/49030-lighting-affects-color

https://en.wikipedia.org/wiki/Leslie_cube

https://en.wikipedia.org/wiki/Emissivity

With the exception of bare, polished metals, the appearance of a surface to the eye is not a good guide to emissivities near room temperature. Thus white paint absorbs very little visible light. However, at an infrared wavelength of 10x10⁻⁶ metres, paint absorbs light very well, and has a high emissivity. Similarly, pure water absorbs very little visible light, but water is nonetheless a strong infrared absorber and has a correspondingly high emissivity. 

 The surface of a perfect black body (with an emissivity of 1) emits thermal radiation at the rate of approximately 448 watts per square metre at room temperature (25 °C, 298.15 K); all real objects have emissivities less than 1.0, and emit radiation at correspondingly lower rates.[