Physics Form 4: Chapter 5 - Refraction of Light

• Refraction is the phenomenon of light bending when it travels from one medium to another medium.
• Refraction occurs because the velocity of light changes when it travels from a medium into another medium.

The law of refraction states that:

1. The incident and refracted rays are on opposite sides of the normal at the point of incidence and all three are in the same plane.
2. The ration of sin i / sin r is a constant. This constant is called refractive index.

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