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  2. Polarizer - Wikipedia

    en.wikipedia.org/wiki/Polarizer

    The Sénarmont prism is air spaced, unlike the Wollaston and Rochon prisms. These prisms truly split the beam into two fully polarized beams with perpendicular polarizations. The Nomarski prism is a variant of the Wollaston prism, which is widely used in differential interference contrast microscopy .

  3. Diffraction spike - Wikipedia

    en.wikipedia.org/wiki/Diffraction_spike

    Diffraction spikes are lines radiating from bright light sources, causing what is known as the starburst effect [1] or sunstars [2] in photographs and in vision. They are artifacts caused by light diffracting around the support vanes of the secondary mirror in reflecting telescopes , or edges of non-circular camera apertures , and around ...

  4. Tyndall effect - Wikipedia

    en.wikipedia.org/wiki/Tyndall_effect

    The Tyndall effect in opalescent glass: it appears blue from the side, but orange light shines through. [1]The Tyndall effect is light scattering by particles in a colloid such as a very fine suspension (a sol).

  5. Pavement light - Wikipedia

    en.wikipedia.org/wiki/Pavement_light

    Solarized pendant prisms, showing a gradient in the solarization. The glass in many old pavement lights is now either purple or straw-colored. This is a side-effect of the manufacturing process. Pure silica glass is transparent, but older glass manufacture often used silica from sand, which contains iron and other impurities. [29]

  6. Prism sight - Wikipedia

    en.wikipedia.org/wiki/Prism_sight

    A Trijicon 3.5x35 ACOG prism sight with a Trijicon RMR reflex sight mounted on the top.. A prism sight or prismatic sight, sometimes also called prism scope or prismatic scope, is a type of telescopic sight which uses a reflective prism for its image-erecting system, instead of the series of relay lenses found in traditional telescopic sights.

  7. Total internal reflection - Wikipedia

    en.wikipedia.org/wiki/Total_internal_reflection

    Fig. 1: Underwater plants in a fish tank, and their inverted images (top) formed by total internal reflection in the water–air surface. In physics, total internal reflection (TIR) is the phenomenon in which waves arriving at the interface (boundary) from one medium to another (e.g., from water to air) are not refracted into the second ("external") medium, but completely reflected back into ...

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