At least wikipedia seems to partially agree (on the cow part), with citations I couldn't verify: https://en.wikipedia.org/wiki/Vaccinia#History https://en.wikipedia.org/wiki/Cowpox
No, as far as I know, there is no limit to a photon's wavelength, so it will just keep on stretching.
Sort of, yes. It's hard to put reasons and interpretations behind all this, because in the end we just use formulas and numbers and check them in experiments. It's usually simpler that way. Be aware that a longer…
> (I tried, but the wikipedia chapter is too complicated for me => trying to simplify here) I can imagine. That stuff on the wiki is not even in every physics bachelor. It's definitely not for a general audience, but I…
Yes, using its momentum and energy. Here you can read the relations between a photon's momentum and things like wavelength. Without any mass :) https://en.wikipedia.org/wiki/Photon_momentum#Physical_prope... (You need…
1) A photon's momentum is related to its wavelength, not it's speed. They all have the same speed in a vacuum. 2) Sure. > So, a remix of the original question, haha: if we say that a photon has no mass, but at the same…
> For perfect reflection, no. That's not true, it wouldn't conserve energy. The kinetic energy of the object that's hit changes, so the light must lose or gain energy. I think for a reflection this must be because of a…
Very nice. I think there are some typos though, below "Here were some of them, along with their continued fractions." Two of the shorthand notations for the continued fractions and the last decimal expansion are wrong.…
At least wikipedia seems to partially agree (on the cow part), with citations I couldn't verify: https://en.wikipedia.org/wiki/Vaccinia#History https://en.wikipedia.org/wiki/Cowpox
No, as far as I know, there is no limit to a photon's wavelength, so it will just keep on stretching.
Sort of, yes. It's hard to put reasons and interpretations behind all this, because in the end we just use formulas and numbers and check them in experiments. It's usually simpler that way. Be aware that a longer…
> (I tried, but the wikipedia chapter is too complicated for me => trying to simplify here) I can imagine. That stuff on the wiki is not even in every physics bachelor. It's definitely not for a general audience, but I…
Yes, using its momentum and energy. Here you can read the relations between a photon's momentum and things like wavelength. Without any mass :) https://en.wikipedia.org/wiki/Photon_momentum#Physical_prope... (You need…
1) A photon's momentum is related to its wavelength, not it's speed. They all have the same speed in a vacuum. 2) Sure. > So, a remix of the original question, haha: if we say that a photon has no mass, but at the same…
> For perfect reflection, no. That's not true, it wouldn't conserve energy. The kinetic energy of the object that's hit changes, so the light must lose or gain energy. I think for a reflection this must be because of a…
Very nice. I think there are some typos though, below "Here were some of them, along with their continued fractions." Two of the shorthand notations for the continued fractions and the last decimal expansion are wrong.…