Take the example of photosynthesis. Plants can't grow without sunlight, which must mean that light is a source of energy, otherwise it shouldn't be a factor. I suppose you could try to explain it away as the plant using the heat generated by the sun, but you can put a plant in a dark room thats heated and it won't grow. Weird stuff.
www.forbes.com
That one’s not hard. The plant is biologically designed to absorb energy from light at certain frequencies in order to trigger the chemical reactions that break down CO2 into glucose. Looking closer, specific light frequencies excite electrons in the chlorophyll to the point where they may be ejected. When this occurs inside of a reaction center, the electron from the chlorophyll molecule jumps to a carbon dioxide molecule (starting the glucose creation) and is then replaced with one from a water molecule, thus creating oxygen.
I explained after that how the energy carried by light at the frequency attuned by the chlorophyll molecule excites electrons. That’s the “absorption.” That energy can be passed from chlorophyll molecule to molecule until it is released in fluorescence or it can be used in the reaction that creates O2 and glucose. Are you looking for why electrons are excited by energy?
That's kind of the basis of this thread. If light contains energy, how can the theory of general relativity be accurate?
The energy of the photons comes from their momentum and not their mass. Since light particles are always in motion, they can have zero mass and fulfill the equation. Light behaving as a wave allows it to have momentum without mass thus carrying energy without mass E = pc.
Ok, but that means that light is variable and not a constant. If photons do contain energy, that means they were blasted off from the source without being affected by its gravity. That sounds fine, but it also makes black holes impossible.
