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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Prism (optics) A familiar dispersive prism. An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base ...
YouTubers are people mostly known for their work on the video sharing platform YouTube. The following is a list of YouTubers for whom Wikipedia has articles either under their own name or their YouTube channel name. This list excludes people who, despite having a YouTube presence, are primarily known for their work elsewhere.
List of successful English Channel swimmers. This is a list of notable successful swims across the English Channel, [ 1] a straight-line distance of at least 18.2 nautical miles (20.9 mi; 33.7 km). [ 2] Aerial view of the Strait of Dover. Ted Heaton (in water) being fed by assistants during his 1910 swim.
The most-subscribed YouTube channel is MrBeast, having 309 million subscribers as of August 2, 2024, and gaining subscribers by an average of over 3 million per week. [14][15] 50 most-subscribed channels. The following table lists the 50 most-subscribed YouTube channels,[B][16]as well as the primary language and content category of each channel.
If you've been on social media (especially TikTok) even a little recently, you've probably seen an ad for Pair Eyewear. While other glasses-by-mail companies compete largely on price, Pair is all ...
The duo ace a placement test by filling out the multiple choice answers at random and are moved up to a gifted class. There, they accidentally cause damage to a student's brain and he is demoted to Beavis and Butt-Head's old class. Featured videos: Infectious Grooves – "Three Headed Mind Pollution" Ethyl Meatplow – "Devil's Johnson"
Lindsey Stirling (born September 21, 1986) is an American violinist, songwriter, and dancer. [3] [4] [5] She presents choreographed violin performances, in live and music videos found on her official YouTube channel, which she created in 2007. [6]