Light And Colors

The Three Ways Light Interacts With Matter-

Its when an light strikes from of matter. and that interacts matter in three types of ways

First, Transparent-  That allowing light to pass through so that objects behind can be distinctly seen.


Second, Translucent-  That is allowing light, but not detailed images, to pass through; semitransparent.

 

Third, Opaque- That Its not able to be seen through transparent.

How the color of an object is determind?

Human can see different wavelenghts of light as different colors for an example can see long wavelenghts as red and short wavelenghts as violet. Also human can see some colors like Pink and Brown are seen when certain combinations of wavelenght are present. also the colors that an object appears to be  the wavelenght from the object.

Color Addition and Color Subtraction?

Color perception, like sound perception, is a complex subject involving the disciplines of psychology, physiology, biology, chemistry and physics. When you look at an object and perceive a distinct color, you are not necessarily seeing a single frequency of light. Consider for instance that you are looking at a shirt and it appears purple to your eye. In such an instance, there may be several frequencies of light striking your eye with varying degrees of intensity. Yet your eye-brain system interprets the frequencies that strike your eye and the shirt is decoded by your brain as being purple.

The previous lesson focused on the principles of color addition. These principles govern the perceived color resulting from the mixing of different colors of light. Principles of color addition have important applications to color television, color computer monitors and on-stage lighting at the theaters. Each of these applications involves the mixing or addition of colors of light to produce a desired appearance. Our understanding of color perception would not be complete without an understanding of the principles of color subtraction. In this part of Lesson 2, we will learn how materials that have been permeated by specific pigments will selectively absorb specific frequencies of light in order to produce a desired appearance.