If light consists of particles, moving at a certain speed and having a certain mass that our eyes can detect, what makes it so much different than other detectable particles moving at other speeds with different masses detectable with other devices?
Are there particles that would be...
Can the theory of gravity be simplified to the attraction of two particles (always of equal mass) rather than the attraction of two massive objects?
If so would the relationship of gravitational attraction have to be calculated according to the relative position of all particles in an object...