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Figure 1. Apparatus used in the Fizeau experiment. The Fizeau experiment was carried out by Hippolyte Fizeau in 1851 to measure the relative speeds of light in moving water. . Fizeau used a special interferometer arrangement to measure the effect of movement of a medium upon the speed of lig
Light painting inside an abandoned limestone quarry in France. Light painting, painting with light, light drawing, light art performance photography, or sometimes also freezelight are terms that describe photographic techniques of moving a light source while taking a long-exposure photograph, either to illuminate a subject or space, or to shine light at the camera to 'draw', or by moving the ...
Sun glitter is a bright, sparkling light formed when sunlight reflects from water waves. The waves may be caused by natural movement of the water, or by the movement of birds or animals in the water. Even a ripple from a thrown rock will create a momentary glitter. Light reflects from smooth surfaces by specular reflection.
Debris in the swirling water in the pool forms complete circles. Long exposures can blur moving water so it has mist-like qualities while keeping stationary objects like land and structures sharp. [6] Varying the shutter speed can produce different effects, preserving some of the water's turbulence or smoothing it out entirely. [7]
Snell's window (also called Snell's circle [1] or optical man-hole [2]) is a phenomenon by which an underwater viewer sees everything above the surface through a cone of light of width of about 96 degrees. [3] This phenomenon is caused by refraction of light entering water, and is governed by Snell's Law. [4]
Natural light photography underwater [13] can be beautiful when done properly with subjects such as upward silhouettes, light beams, and large subjects such as whales and dolphins. Although digital cameras have revolutionized many aspects of underwater imaging, it is unlikely that flash will ever be eliminated completely.