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2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   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]

3. Prism lighting - Wikipedia

   en.wikipedia.org/wiki/Prism_lighting

   Prism lighting is the use of prisms to improve the distribution of light in a space. It is usually used to distribute daylight , and is a form of anidolic lighting . Prism lighting was popular from its introduction in the 1890s through to the 1930s, when cheap electric lights became commonplace and prism lighting became unfashionable.

4. I’ve Been Using This Light Therapy Lamp for 2 Winters Now ...

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5. Artificial sunlight - Wikipedia

   en.wikipedia.org/wiki/Artificial_sunlight

   Artificial sunlight. Appearance. The HappyLite is a type of light therapy. Artificial sunlight is the use of a light source to simulate sunlight where the unique characteristics of sunlight are needed, but where sufficient natural sunlight is unavailable or infeasible. A device used to simulate sunlight is a solar simulator .

6. Shoppers say this affordable light therapy lamp helped boost ...

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7. Strobe light - Wikipedia

   en.wikipedia.org/wiki/Strobe_light

   Blue Strobe light. A strobe light or stroboscopic lamp, commonly called a strobe, is a device used to produce regular flashes of light. It is one of a number of devices that can be used as a stroboscope. The word originated from the Ancient Greek στρόβος ( stróbos ), meaning "act of whirling". A typical commercial strobe light has a ...

8. Olympics-U.S. Rodchenkov act jeopardises safety of Olympic ...

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   PARIS (Reuters) - A United States law on anti-doping at the heart of a dispute with the IOC jeopardises the safety of the Olympic movement and must be addressed after the country was awarded the ...

9. Prism (optics) - Wikipedia

   en.wikipedia.org/wiki/Prism_(optics)

   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 ...