What is inside a beam of light?
Answer Hi Amir, Most light is not in a beam form, but goes out spherically from its source. There are 2 basic ways of examining light, and both are correct– and accepted as fact. If you think of light as a massless particle, then light is made up of what we call photons (another term is energy packets) which travel, of course, at light speed, or around the earth 7 times in one second. (186,000 miles per second). Nothing can travel faster, so that is the ultimate speed limit of the Universe. The other way of looking at light is as a wave function where the energy of light is composed of sine waves at various wavelengths and frequencies. The typical green/yellow wavelength (in about the middle of the visible color spectrum) is about 20 millionths of an inch long. So light exhibits both particle and wave functions simultaneously. We don’t know why, but it does. Light photons can be in many forms – various wavelengths, ranging through the complete electromagnetic spectrum. At longer wavel
