“The plural form of quantum is Quanta, and Photon is the Quanta that compose Light.”
A Universe filled with dark energy ensures that even the photons that exist today redshift to arbitrarily low energies. The new ones will always get created, leading to a Universe with a finite and positive photon number and photon. The energy density at all times.The Expanding of the Universe
How does light only live forever?
One of the greatest ideas of the universe is that whatever exists in the universe someday will come to an end. The stars, galaxies, and even the black hole that comes into our whole space someday will all burnout and will fade away. But there could be an exception to this general rule that something will live forever.
It has been assumed that a photon is a quantum that has no mass. If they could have their mass, there could be more lighter particles and therefore have finite lifetimes. A study in Germany on cosmic microwave radiation found the oldest light in the universe discharged right after “the Big Bang” around 13.7 billion years ago.
The photoelectric effect leads to the particle nature of the photon. There is also the effect of the polarisation of the light that leads to the case that the photon is a wave. In contrast, there is no convincing theory that explains how and why the photon behaves sometimes like a particle and sometimes like a wave.
All of the above, together with the finding that a photon has neither load nor mass. And it leads to the proposal that “the photon is neither a wave nor a particle.” “The photon is a simple interaction that, depending on conditions, behaves sometimes like a particle and sometimes like a wave”.
Does Light Ever Experience Time?
As we know, light is made up by composing of Quanta (Quantum Plural) which is Photon. And photons don’t experience time at all. From the perspective of a photon, there is no such thing as time. It’s emitted and might exist for hundreds of trillions of years, but for the photon. There’s a zero-time gap between when it’s emitted and when it’s absorbed again. It doesn’t experience distance either.
Since photons can’t think, we don’t have to worry too much about their existential horror of experiencing neither time nor distance. But it tells us so much about how they’re linked together. Through his Theory of Relativity, Einstein helps us understand how time and distance are connected.
