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
Smaller than I expected for the price.
i use my mug for sperm donation
10/10, great for taking a massive shit in. Overflows if its more than 2 pounds, but its part of the fun, right?
Needed one to gift to my colleague in pests exptermination department, takes care of my bug pretty well. Damn well of a bugger, if I would, ol' chap. 😌
My nan bought this mug, took one sip and died on the spot. absolute joke.
it was day my mug had just arived i went to the door and grabed the box i closed the door AND BAM thge mug flew at me knockingme to the grouynd when on the ground the mug unzipped my pant a flew up my ass 10/10 loved it would buy
I love pooping in this mug, great experince. But if you do more than 1 pound as I do, search for a bigger one
i love men and cups so this cup was perfect for me
Amazing mug, really high quality, I love it!
fantastic, personal gift to share with anyone!
The mug arrived very packed and on time. I love how well crafted the coffee mug is. I plan on ordering other merch from URBAN Dictionary soon. Thanks.
It morbed its way into my anus, a bit weird, but otherwise happy with my purchase
After watching that anal jar video, I felt inspired. That's when I found this mug.
FUCK YEAAAAAAAA! MUUUUGZ WOOOOOO
Happy with my purchase
amazing I will buy this. it will be my child. I WILL BE KING OF THE 0w0
I loved this mug! when i drink out of it it always has a horrible stench and honestly i dont mind because i love smelling it. my boyfriend thinks i should throw it away because he says "its has lead poisoning" but i cant get rid of it. when my mom died i bought her a mug that said "deceased" because i thought it would brighten the moment when i open presents at her funeral (it worked). but if your looking for something to buy, you should really get one of these mugs. they are cute, nerdy, and remind me of my dead mother!
Yay. I got a mug... And it has the most accurate definition of my name ever lmfao. The quality is great and it's totally worth the price. For me, at least :)
The accuracy is real! My husband and I have 3 daughters. Our last name is Staats, in UD was spot on! Unbelievable! I got it to my husband just in time for Father's Day! Lol!
love it sm, gives a clear understanding of the word every sip thankyou
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