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Calimero
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What is the ratio of energy contained in photons vs energy contained in neutrions in the present universe? Also, how is that ratio changing with time? Thanks.
Drakkith said:nick, how much does that change assuming neutrino's have mass?
Photons and neutrinos are both subatomic particles, but they differ in their properties and behavior. Photons are particles of light that have no mass and travel at the speed of light. They have a specific amount of energy based on their wavelength or frequency. Neutrinos, on the other hand, have a very small mass and travel very close to the speed of light. They have a very small amount of energy compared to photons.
Photons interact with matter through electromagnetic forces, such as absorption or reflection. They can also be converted into other forms of energy, such as heat or electricity. Neutrinos, on the other hand, rarely interact with matter because they have no electric charge. They can pass through most matter without being affected, making them very difficult to detect.
The energy ratio between photons and neutrinos in the universe is estimated to be about 10 billion photons for every 1 neutrino. This is because photons were created in large quantities during the Big Bang, while neutrinos were created in smaller amounts and have since dispersed throughout the universe.
No, photons and neutrinos cannot be converted into each other. As mentioned earlier, photons have no mass while neutrinos have a very small mass. This means they have different properties and cannot be transformed into one another.
Photons and neutrinos both play important roles in the energy balance of the universe. Photons contribute to the radiation energy density of the universe and are responsible for the cosmic microwave background radiation. Neutrinos, although they have a smaller energy density, still make up a significant portion of the universe's energy budget and are important in understanding the evolution of the universe.