radiometer Mug
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
Customer Reviews
Cool
I got this for my dad but he didn’t want it so he just gave it to me. Ever since I took it back my life has been the greatest it’s ever been. I asked my other dad if he wanted but he said no too. Oh well, I get to enjoy this product for myself more.
It was the greatest mug I've ever ordered :skullll
This mug has made me so happy. This is more than I could have ever wanted in life.
My friend loved it.!!
I like it, but not a lot. Also, the mugs are overpriced.
i luv it! great quality and actually the same hight as mossoflife!
Loved it, my co-workers liked the mug.
best mug every i get to wake up every morning to sip out of my sexy lama mug
I really like this mug. It’s quite bizarre and helps me live a quiet life in my small town of Morioh, Japan.
briliant buy great gift for my grandkid! love it!
This mug saved my life from spiraling down a deep dark path.
Great present for my wife, she uses it all the time, and it's her to a T.
I love it. High quality. Just as I had hoped.
This mug looks great! I love it!
I have a crippling addiction to these mugs, i have 459
This mug is wonderful it’s so funny and I gave it to the kid that made the Definition and he started dying laughing
War. War Never Changes. War, war never changes. In the year 1945, my great-great grandfather, serving in the army, wondered when he get to go home to his wife and the son he never see. He got his wish, when the U.S. ended WWII by dropping an atomic cloud on Hiroshima and Nagasaki. The world awaited Armageddon, instead, something miraculous happened. We began to use atomic energy as a nearly limitless source of power. People enjoyed luxury once thought in the realm of science fiction. Domestic robots, fusion powered cars, portable computers. Then, in the 21st century, people awoke from the American dream. Years of consumption led to the shortages of every major resource. The entire world unraveled. Peace became a distant memory. It is now the year 2077, and we stand on the brink of total war, and I am afraid, for myself, for my wife, for my infant son, because if my time in the army taught me one thing; is that war, war never changes.
Excellent satire - didn't see comments to that end, so find it hard to fathom if most readers, in turn, didn't laugh out loud, and say so. But apparently not.
I am gonna buy it and give it to my nine year old brother