3N3

is unpredictable

Physics.
Teacher-in-charge: Mr chio
Students: Adlin, Diyanah, Elisa, Grace, Jermaine, Jingsheng, Pauline, Qianwei, Saiful, Tabatha, Vinis, Wende, Zongxian,

At first we will look at a simple refraction, one that happens at a flat boundary. Below is a picture of such a situation. Here a single ray of light strikes a boundary between two mediums and is refracted.

Here are descriptions for the terms in this diagram:

• The ray of light which travels through the incident, or first, medium and strikes the boundary, or interface, is called the incident ray.
• The ray of light which travels into the refracted, or second, medium and leaves the interface is called the reflected ray.
• A line perpendicular to the surface is imagined at the point of refraction. This line is called a normal. In this context the word normal means perpendicular. In the above diagram the normal is colored blue.
• The angle between the incident ray and the normal is called the angle of incidence, or the incident angle.
• The angle between the refracted ray and the normal is called the angle of refraction, or the refracted angle.

The above picture demonstrates the general behavior of a light ray as it travels from air into some transparent medium such as water or glass.

http://id.mind.net/~zona/mstm/physics/light/rayOptics/refraction/refraction1.html

saiful ^^v