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Hace 1 día · Light painting dates back to 1889 when Étienne-Jules Marey and Georges Demeny traced human motion in the first known light painting Pathological Walk From in Front.. The technique was used in Frank Gilbreth's work with his wife Lillian Moller Gilbreth in 1914 when the pair used small lights and the open shutter of a camera to track the motion of manufacturing and clerical workers.
Hace 6 horas · Attenuation. In physics, attenuation (in some contexts, extinction) is the gradual loss of flux intensity through a medium. For instance, dark glasses attenuate sunlight, lead attenuates X-rays, and water and air attenuate both light and sound at variable attenuation rates. Hearing protectors help reduce acoustic flux from flowing into the ears ...
