Who discovered the speed of light?

Ole Roemer

What does C stand for in E mc2?

Speed of light

What does C stand for in physics?

electric charge coulomb

What is the full equation for E mc2?

It just describes objects that have mass and that aren’t moving. The full equation is E squared equals mc squared squared plus p times c squared, where p represents the momentum of the object in question.

Is E mc2 proven?

It’s taken more than a century, but Einstein’s celebrated formula e=mc2 has finally been corroborated, thanks to a heroic computational effort by French, German and Hungarian physicists. In other words, energy and mass are equivalent, as Einstein proposed in his Special Theory of Relativity in 1905.

Does light have energy?

Light has no mass so it also has no energy according to Einstein, but how can sunlight warm the earth without energy? Light indeed carries energy via its momentum despite having no mass.

What’s inside a photon?

A photon is massless, has no electric charge, and is a stable particle. In a vacuum, a photon has two possible polarization states. The photon is the gauge boson for electromagnetism, and therefore all other quantum numbers of the photon (such as lepton number, baryon number, and flavour quantum numbers) are zero.

Can photons be created?

6. Photons are easily created and destroyed. Unlike matter, all sorts of things can make or destroy photons. If you’re reading this on a computer screen, the backlight is making photons that travel to your eye, where they are absorbed—and destroyed.

Are photons dangerous?

Enormous levels of kinetic energy can be transferred through microscopic to cosmic distances by photons that travel at the speed of light, carrying a relativistic mass/energy. This energy, when photons collide with atoms and molecules of living systems can cause serious damage or death.

https://www.youtube.com/watch?v=Ala6euHxEuk