Light Waves: That part of the electromagnetic spectrum that contains visible light. The colors, from longest wave length to shortest, are red, orange, yellow, green, blue, indigo, and violet (ROY G. BIV).

 

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Light Waves: That part of the electromagnetic spectrum that contains visible light. The colors, from longest wave length to shortest, are red, orange, yellow, green, blue, indigo, and violet (ROY G. BIV).

Coherent Light: Light waves that vibrate with constant phase relationships. They can be produced by a laser or a combination of two prisms.

Lighting Direction: The positioning of lights relative to the object being shot. The norm for lighting direction is three-point lighting.

Lighting Intensity: The power of a light source. Regarding the relative intensity of lighting sources, see three-point lighting.

Lighting Diffusion: The hardness or softness of a light source. Hard light casts a sharp, definite shadow.

Lighting Color: Light may be 'colored' by placing a filter or gelatin in front of a light source.

Lightfast: A pigments resistance to fading on long exposure to sunlight. Watercolors are rated lightfast on a scale of I-IV. I and II ratings are the most permanent.

Lightfastness: No loss of color due to exposure to light, heat or weathering.

Lighting: The placement, type, direction, and brightness or dimness of lights used on stage. Often lighting can establish mood, highlight specific characters, actions, or scenes, or serve symbolic purposes.

Lighting Ratio: Ratio of the brightness of light falling on the subject from the main (key) light and other (fill) lights. A ratio of about 3:1 is normal for color photography.