radiometer
A radiometer or roentgenometer is a device for measuring the radiant flux (power) of electromagnetic radiation. Generally, a radiometer is an infrared radiation detector or an ultraviolet detector.1 Microwave radiometers operate in the microwave wavelengths. While the term radiometer can refer to any device that measures electromagnetic radiation (e.g. light), the term is often used to refer specifically to a Crookes radiometer ("light-mill"), a device invented in 1873 in which a rotor (having vanes which are dark on one side, and light on the other) in a partial vacuum spins when exposed to light. A common belief (one originally held even by Crookes) is that the momentum of the absorbed light on the black faces makes the radiometer operate. If this were true, however, the radiometer would spin away from the non-black faces, since the photons bouncing off those faces impart more momentum than the photons absorbed on the black faces. Photons do exert radiation pressure on the faces, but those forces are dwarfed by other effects. The currently accepted explanation depends on having just the right degree of vacuum, and relates to the transfer of heat rather than the direct effect of photons. 23 A Nichols radiometer demonstrates photon pressure. It is much more sensitive than the Crookes radiometer and it operates in a complete vacuum, whereas operation of the Crookes radiometer requires an imperfect vacuum.
The Urban Dictionary Mug
Just as expected, high quality
I bought the ratty bratty mug. I love it such a STROng message! :)
Better than advertised! Colors and text were exactly as shown on website. Quality cup also. Very happy.
Fuck your mugs and your tees
Cup is for a good friend. I haven’t given it to her yet but if she’s excited as I am, she’s gonna love it thanks guys.
good service, delivery time was quick
I LOVE my mug! It's such a meaningful way to remember a word my Dad "coined" When I was a child. I am very pleased.
Holy Cow, when I ordered the mug I mistakenly googled flenching instead of fetching! My wife and German Shepard compete in AKC canine agility competition and our German Shepherd won the fetching competition. To surprise her I thought I bought her a fetching coffee mug, needless to say I’m now living in Hotel 6.
My dad hated it🤣
This is the coolest Anspaugh mug that ever existed.
Great ordering experience..good quality
8.3 cm diameter? I hardly know her
The day this mug entered my life, my depression was cured, I won the lottery, my dad came back from the dead, and my mum started loving me, motto beg but if you rub the mug 3 times a genie WIll grant you 69 wishes (I wished for more mugs 69 times)
Gift for my niece. She loves it.
I don’t really want to by it but I do like that you can customize it Also I do find find funny nearly all the one star reviews are people say “I want the mug for free”
i tried to break this shit mug but died got reincarnated came back to life and this shitty mug was still there
How many ounces does it hold? I don’t know ask him. HIM!HIM! Fuck him! It’s catchy
Great experience with the Urban Dictionary and ordering my mug. Any concerns that were related to them were received promptly. Overall, it was a great experience
i love this mug its not a mistake ITS A MASTERPIECE
Describes my classmate in school, perfect
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