The discussion revolves around the interaction between light waves and air molecules, particularly focusing on how light can contribute to heating the air. Participants explore the nature of light as a wave and its energy transfer mechanisms, as well as its interaction with matter.
Participants present various viewpoints on the interaction of light and matter, with some agreement on the nature of light as an electromagnetic wave and its role in energy transfer. However, there is no consensus on the initial question regarding the nature of light as matter.
Some assumptions about the nature of light and its interactions with matter remain unaddressed, and the discussion does not resolve the complexities of how light behaves in different contexts.
Nugatory said:Light is an electromagnetic wave (google for that and you'll find some good stuff).
It interacts with matter because the electrons on the outside of atoms are electrically charged so are affected by changes in the electrical and magnetic fields around them (sort of the way that an object floating in water moves up and down when a wave comes by).
Generally if the light is absorbed by the matter (instead of being reflected, as with a mirror, or passing through unaffected, as with glass or clear air) the energy of the wave will end up as heat.