Light may affect the growth of crystals if they are light sensitive. An example of this is the formation of ice crystals on silver iodide. Ice crystals form on the surface of silver iodide when illuminated with white, but not red light.
The polarization of light from an infrared laser may affect the structure of a crystal. Light can also speed up the nucleation rate, which describes the formation of the crystal component, but not the growth of the crystal structure that is visible. Crystals of silver bromide and silver iodide, two components of photographic film, decompose to silver metal when exposed to light.Learn More
Light is the triggering force behind many chemical, biological and physiological changes in life forms on Earth. It provides much needed energy, and it also forms the foundation that aids in visibility.Full Answer >
Ultraviolet light comes from the Sun. Earth's ozone layer absorbs most of the ultraviolet light before it reaches the surface, protecting humans and all other life forms from the harmful effects of these rays.Full Answer >
When light travels in a vacuum, its speed is 186,282 miles per second. The fastest aircraft, which is the Boeing-43 scramjet, has a speed of 7,546 miles per hour. If these two speeds are compared, the jet's speed is approximately 0.0004 percent that of light.Full Answer >
A light ray is a basic element in geometrical optics. It is a hypothetical construct that, from any point in space, indicates the propagation of light. The concept that light travels in straight lines led to the development of the light ray concept.Full Answer >