Light is actually an electromagnetic wave, but in Canon BP-809 Charger geometrical optics, people tend to see it as a light energy in the direction of propagation geometry line, called the light, the light in a uniform media is spread along the straight line.

The light generally fall into the infrared, ultraviolet, visible 3 kinds.

Infrared ray is a not visible light photography skills, its main effect is hot effect, strong infrared radiation of the human body, can cause the skin damage, appear,canon bp-53 charger burns and similar skin burned.

Ultraviolet ray also is a kind of not visible light, it in production, national defense and medicine has a wide variety of applications, such as disinfection, sterilization, ground detection, etc.

"Photography is the art of light," no light there is no photography. Photography is most of light.

Shooting scene assembly, waiting for is the norm, I had waited a whole day anyting experience, so like landscape photography of you, want to bear live wait for lonely. canon mvx100i charger