Wikipedia is amazing, and I have donated to them a number of times. But something just rubs me the wrong way about their current donation drive and anything I read about how much their higher ups are getting paid makes no sense to me. Why are the salaries so high? Where is the clear breakdown of server cost and infrastructure?
Dimand
joined 9 months ago
I feel like this needs to be a PSA pinned to this community. Far too often it would say 2 comments and I would see nothing untill I did this.
Depends if you care about names or about physics. Radio, Infrared Gamma etc are just names we give to various parts of the continuous electromagnetic spectrum. The edges of these definitions are not super well defined. Changing from RF to microwave could be defined at say about 3 GHz, but there is not some clear physical difference between a 2.9 GHz photon and a 3.1 GHz photon other than the frequency change.
The lower limit to the frequency is I guess the inverse of the theoretical age of the universe/2. Something can't currently be oscillating slower than that.
There are some theories on plank length, quantisation limits, etc that might set some theoretical upper limit of photon frequency. But we don't appear to be anywhere close to observing such things. We have seen some rather crazy short wavelength particles that we haven't fully understood.
https://en.m.wikipedia.org/wiki/Oh-My-God_particle