Pangaea Updated +Created
Peripheral Updated +Created
Photomultiplier tube Updated +Created
Can be used to detect single photons.
It uses the photoelectric effect multiple times to produce a chain reaction. In particular, as mentioned at youtu.be/5V8VCFkAd0A?t=74 from Video 1. "Using a Photomultiplier to Detect single photons by Huygens Optics" this means that the device has a lowest sensitive light frequency, beyond which photons don't have enough energy to eject any electrons.
Video 1.
Using a Photomultiplier to Detect single photons by Huygens Optics
. Source. 2024. Wow this dude is amazing as usual. Unfortunately he's not using a single photon source, just an LED.
1922 Nobel Prize in Physics Updated +Created
Age of Empires Updated +Created
Age of Empires II Updated +Created
Video 1.
Parsa's Age of Empires II Cartoons (2021)
Source. The cutest fan art ever!
Agilent Technologies Updated +Created
In a way, Agilent represents the most grassroots electronics parts of HP from before they became overly invested in laptops and fell.
They spun out the electronics part as Keysight in 2014, becoming life science only.
Polarization of light Updated +Created
This section discusses the pre-photon understanding of the polarization of light. For the photon one see: photon polarization.
People were a bit confused when experiments started to show that light might be polarized. How could a wave that propages through a 3D homgenous material like luminiferous aether have polarization?? Light would presumably be understood to be analogous to a sound wave in 3D medium, which cannot have polarization. This was before Maxwell's equations, in the early 19th century, so there was no way to know.
Province of China Updated +Created
Four-level laser Updated +Created
Stack Overflow link-only answer policy Updated +Created
LLM game Updated +Created
Polymer Updated +Created
Public university Updated +Created
Quantum dot Updated +Created
Monotreme Updated +Created
The weirdest mammal clade: they lay fucking eggs. Only 5 known species alive as of 2020.
Eggs are basal: they simply didn't evolve out of what other reptiles do. From which we conclude that milk came before eggs stopped.
So this is the most basal subclade of mammals.
Etymology: means "single hole" in Greek, because like other reptiles it has a single hole for shit, pee and fucking: the cloaca.

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