fresnel
IPA: frˈɛznʌɫ
noun
- (physics) A unit of frequency equal to 10¹² hertz, or one terahertz.
- A Fresnel lens or a light feature using such a lens
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Examples of "fresnel" in Sentences
- It's an historic landmark and boasts a first-order fresnel lens.
- “Excellent fresnel location,” he whispered, and walked toward the Tree.
- When you are finished admiring the beautiful fresnel lens, its glass prisms and its view, walk down the road and take the stairs down to the beach.
- Consider a trip out to the western edge of the peninsula to the Point Reyes Lighthouse, which was built in 1870 and still boasts a 6,000 pound "fresnel" lens.
- This was taken with a homemade, 6mp Sony point and shoot camera modified and hooked up to a control board, then secured in a waterproof case with glass over the flash and lens, and a fresnel lens over the PIR sensor on the board.
- i worked with a wISP for a while. 700mhz and 900mhz equipment can handle a surprising amount of foliage and still provide a decent connection. however, they wont shoot straight through trees, but if foliage is in some of the lower part of the trannsmission field (called a fresnel zone) then the signal is passable.
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