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
I got it in the mail. then The next day it was sleeping with My non Existant Gf
I thought this mug was a bear.
it is pretty good but not all of it describes me god bless all Nevaeh's
i love it i love this mug my boyfriend got this for me as a gift i love it very much i highly recommend this for you or a loved one it is very good i am planning to get my mans one on his birthday i hope he will love it thanks guys for listening
EEEEEEEEEEEEEHHAAAAAAAAAAAAAA :))))))))
This was a phrase my husband and I made up even we first started dating. We laughed so hard while submitting it. The mug is perfect!
Urban Dictionary. Mixes truth with lies. Keeps a record. Thanks for the truthful parts, bro. 🙏💪✝️
I wish I had this mug I SOOOO wish I had this mug! I never find anything that has my name on it unless I have it custom made. I'm actually quite surprised that 'Lani' is on the Urban Dictionary... And the definition is pretty accurate ;)
really awesome mug I gave this mug as a secret Santa gift and and my cousin still uses it to this day. It is truly a awesome mug and it deserves 5 stars.
i shit in it
I cumed in my pants when it arrived in the mail. no more porn, just mug
i love it. my friend loved it. yay. now i'm happy and not depressed anymore.
You can't get a mug from any other dictionary site
Was quality and delivered quick our friend loved it!
Quality and style are outstanding relative to price point.
Quick delivery, easy ordering, unique and special gift!
My coach loves it. I gave this to my coach and she was over the moon. Ever been hugged by an Olympic gold medalist?
Perfect cuup of coffee size, and the printing is spot on!
Arrived speedily and exactly as pictured.
I LOVE GETTING THE FUCKING MUG
Review Details
Pro Customization
Create unique products with your own words and definitions
Live Preview
Personalize Your Design
Debug: Product Metadata
| Key | Value (click to copy) |
|---|---|
Copied! |
Return Policy
Made Just For You
Each product is custom-printed with your unique text, making it truly one-of-a-kind.
Defect-Free Guarantee
If your product arrives with printing defects, damage, or quality issues, we'll send you a free replacement.
Custom Orders
Due to the personalized nature of your order, we don't accept returns for change of mind or sizing issues.
Questions about your order? Contact our support team for assistance.