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The arrows represent the amplitudes of sine functions with different peak-values and frequencies. They are the first six terms of a Fourier series derived from the square wave motion of the blue dot, which transitions between only two amplitudes.
I purposely used only pure red, blue, black, and white in this animation so all the color content could be described using only two bits of data per pixel. Anti-aliasing the edges would have doubled or quadrupled the size of the file. This also explains why the five tracking balls are all red instead of a mix of colors: bigger file size.
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The dress was a viral phenomenon, which was either seen as blue and black or as white and gold. Its true colours were eventually confirmed to be blue and black. [2] Ebbinghaus illusion: The Ebbinghaus illusion, or Titchener circles, is an optical illusion of relative size perception. The two orange circles are exactly the same size; however ...
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The yellow lines describe how photons were scattered before the epoch of recombination and were free-streaming after. In astronomy, a free streaming particle is one that propagates through a medium without scattering. The particle is often a photon, but it can also refer to neutrinos, cosmic rays, and hypothetical dark matter particles.
The orange arrows show the apparent position of the background source. The white arrows show the path of the light from the true position of the source. In the formation known as Einstein's Cross , four images of the same distant quasar appear around a foreground galaxy due to strong gravitational lensing.
The particles are represented by the diagram lines. The lines can be squiggly or straight, with an arrow or without, depending on the type of particle. A point where lines connect to other lines is a vertex, and this is where the particles meet and interact. The interactions are: emit/absorb particles, deflect particles, or change particle type.