We understand light is made up of particles. A beam of light particles would have weight of some amount, if so could Light push or propel an object?
It can, in a way. Classically, light has no mass, but DOES have momentum. Which is how the solar wind can move objects, like a solar sail. People have been trying to measure the mass of light for decades (read the paper by Proca for more info). At the moment, we have an upper limit (it must be less than) 10^-61 grams per photon. There are many ways to test for light having mass, but so far, nothing.
true, light doesn't fall into classical physics since light itself made up of the particles that make up atoms. light isn't actually an atom thusly cannot display mass as we know it (as of yet) light is energy and energy can be seen as mass, even converted in certain experiments.....
Well, light can be viewed as a particle. But it's a massless particle. On the other hand, a ray of light is bent when passing a massive object. And that could be viewed as one of the properties of a body that has weight. So this means that I can't say yes and I can't say no. Gonna have to think about this one........
We already know that light can push or propel and object. All it needs for that is energy (which it is known to have). Mercury's perihelion advance is explained (under Relativity) by the analogy that sufficienly dense light affect gravity as if it has mass (E = m c^2 becomes m = E / c^2 ) Weight is the response that mass has to a gravity field. Because we have mass, we are attracted by Earth. The surface is in our way and will press back to keep us from falling. This pressure is known as weight. Light is deviated by the presence of mass, showing that it can be subject to gravitational attraction. Some would use that to say that light has weight. It can only be used to show that light can act as if it had mass (alternatively, it can be used to show that the continuum is curved and light simply follows the curves). However, if something gets in the way to keep it from falling, the light ceases to exist (its energy is absorbed) because light cannot exist at any other speed than the speed of light. So I say light has no weight. Your milleage may vary.
