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  2. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    Spot A non-imaging spot Fresnel lens uses ring-shaped segments with cross sections that are straight lines rather than circular arcs. Such a lens can focus light on a small spot, but does not produce a sharp image. These lenses have application in solar power, such as focusing sunlight on a solar panel.

  3. What were those red spots during the solar eclipse? An ...

    www.aol.com/were-those-red-spots-during...

    Hybrid image of solar prominances and the solar chromosphere from NASA satellite images. Chromosphere literally means “sphere of color” and is the second of the Sun’s three main layers.

  4. Sun dog - Wikipedia

    en.wikipedia.org/wiki/Sun_dog

    Sun dogs typically appear as a pair of subtly colored patches of light, around 22° to the left and right of the Sun, and at the same altitude above the horizon as the Sun. They can be seen anywhere in the world during any season, but are not always obvious or bright.

  5. Bronze (color) - Wikipedia

    en.wikipedia.org/wiki/Bronze_(color)

    Bronze statue of the Roman Emperor Augustus. Bronze is a metallic brown color which resembles the metal alloy bronze. A bronze medal. The first recorded use of bronze as a color name in English was in 1753. [3]

  6. Solar lamp - Wikipedia

    en.wikipedia.org/wiki/Solar_lamp

    A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.

  7. Searchlight - Wikipedia

    en.wikipedia.org/wiki/Searchlight

    ATS officers-in-training crew a 90 cm searchlight in Western Command, 1944. A searchlight (or spotlight) is an apparatus that combines an extremely bright source (traditionally a carbon arc lamp) with a mirrored parabolic reflector to project a powerful beam of light of approximately parallel rays in a particular direction.

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