What's the fastest thing on Earth?

[admin]

Particles from space are constantly zooming into Earth. But which one is the speediest?

What's the fastest thing on Earth? : Read more

 

[neo]

“Once a photon hits Earth's atmosphere, it slows down slightly.”

https://www.newscientist.com/lastwo...-photon-know-to-travel-at-the-speed-of-light/

https://en.wikipedia.org/wiki/Scattering/

The photon does not slow down. Photons only travel at C.
It is the light wave that slows down due to scattering
(photons take a longer path from point A to point B … due to collisions). This is called refraction.

“No particle with mass can reach the vacuum speed of light,
but if it's very light and has a lot of energy, it can get very close ...
The superfast neutrino detected in 2016 would have 33 9s”

Yet many people (including some scientists) still believe
that as a particle approaches C, its mass approaches infinity …
observations (like the one above) aren’t on their side.