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Since matter-antimatter annihilation produces radiation, what prevents us from estimating the size of the effect by measuring the background radiation of the un
by nimih 9y ago
Since matter-antimatter annihilation produces radiation, what prevents us from estimating the size of the effect by measuring the background radiation of the universe and comparing it to the amount of observable matter?
- qubex 9y agoI presume the volume of the Universe. We can measure average density of residual radiation but getting the total value of energy requires multiplying by volume. Much of the universe's volume may be hidden behind a cosmological horizon (basically, the idea that as the universe's rate of expansion accelerates the greater the distance from us (Hubble's constant), eventually the rate of expansion exceeds the c and thus light from that part of the universe can never reach us, making it unobservable).