Physics Textbook/Summary


 * Light is a form of energy. It travels in straight lines.


 * The speed of light is constant in a vacuum. It is approximately equal to 3.0 x 108m/s.


 * Light rays are regularly reflected by smooth, shiny surfaces. Images form on these surfaces. These are irregularly reflected by rough surfaces. No image forms on these surfaces.


 * Light rays are refracted when they pass at an angle from one medium to another.


 * Light travels in a less dense than in a denser medium.


 * Sunlight separates into different colors, called the visible spectrum, as it passes through a prism. The spectrum consists of the colors of the rainbow: red, orange, yellow, green, blue, indigo, and violet.


 * Dispersion is the separation of visible light into its different colors: red, orange, yellow, green, blue, indigo, and violet.


 * Red, green, and blue (RGB) are the primary colors in light.


 * When white light falls on an object which does not transmit light, one of the following happens:


 * all of the colors in white light are reflected: the object will appear light;


 * some of the colors may be reflected: the object appears colored; and


 * all the colors are absorbed by the object: the object appears black.


 * The colors of opaque objects are the colors they reflect and which reaches our eyes. The colors of transparent materials are the colors they transmit.

FORCES
>>Newtons Second Law of Motion<< Equation : [F=ma], where 'a' sometimes can be used as 'G' which is equal to [9.8 m.s¯ ²]