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Imaging a Flame with Schlieren Photography

Schlieren photography is an optical imaging technique that...

*Imaging a Flame with Schlieren Photography* Schlieren photography is an optical imaging technique that allows for the visualization of small differences in *index of refraction* . This makes inhomogeneities, such as temperature, pressure, or composition, in normally transparent materials easily observable with a camera. Hot air rising upwards from an open flame results in billowing clouds wh...

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Sun Halo Season This shot was framed over the North York Moors, a national park in Yorkshire, England. The bright ring around the sun is a classic Sun Halo, a circular pattern that occupies a section of the sky 22° from the sun. It is formed by sunlight passing through tiny ice crystals in the sky. As the light hits one surface of the crystal, its path refracts (bends at a defined angle), the...

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