Two color coding schemes exist to guide applicators when selecting. nozzles for pesticide applications. The color schemes are designed to. help applicators achieve accurate, effective crop protection. It may be. confusing, but the color schemes represent flow rate and droplet. size and are independent of one another.
If E = mc^2, and light = E, then light = mc^2. Therefore light is matter. Given, as Claude Bile stated (post #4), âE = mc^2 is the equivalence of mass and energy, not matter and energyâ, I guess they are saying that because light has relativistic mass it is matter.
However, we do have some ideas about why light is able to travel through both vacuums and air with no problem. It all has to do with the dual nature of light. Thanks to Einstein and Bose we know that light is both a wave we know as electromagnetic radiation and a particle called a photon. The photon because of its weird nature as a force carrier called a boson has no mass. However it can still be absorbed, reflected, or refracted if it come in contact with a medium. That is why like sound the speed of light slightly varies between when it is in our atmosphere and when it is in space. When in the medium of air how it travel makes sense as waves travel by vibrating through a medium. In space the particle does not need to interact with a medium in fact its speed improves in a vacuum. The main thing that can stop or slow down light in space is gravity.