White anything will REFLECT radiation, it will not transmit or absorb.
It doesn't absorb clever. It penetrates, and it can penetrate paper, smoke, a layer of skin and thin aluminium.
Black absorbs radiation. A perfectly black body would absorb all the radiation that is incident upon it.
All materials will reflect, absorb and transmit (allow to pass through) electromagnetic radiation. This is called the Transmit/Reflect (T/R) ratio and it will vary for a material based on the wavelength of the incident radiation. IR radiation does not transmit through most materials. It is absorbed/reflected. Metalized Mylar has a small transmit/reflect ratio.
visible
the sun
Good absorbers of heat radiation are like basically materials which are dark in colour. Because for some reason they tend to absorb more radiation than light coloured materials.
Troposphere does not absorb solar radiation. All other layers do not absorb.
Simple materials can be used like black plastic or metal pipe. You want materials that will absorb heat and transmit that heat to the liquid.
Most background radiation comes from natural sources, while most artificial radiation, plants absorb radioactive materials from the soil and these pass up the food chain.
Gases absorb radiation and some is absorbed in the atmosphere :)
No all molecules do not absorb infrared radiation. Some of them do.
White anything will REFLECT radiation, it will not transmit or absorb.
It doesn't absorb clever. It penetrates, and it can penetrate paper, smoke, a layer of skin and thin aluminium.
The ozone layer absorbs ultraviolet radiation. The ozone layer is in the stratosphere. So, the thermosphere does not absorb radiation.
The gas which absorb ultraviolet radiation is ozone. It absorbs the harmful Uv radiations from the sun.
Yes cactus do absorb radiation. But they do it for a limited range.