state the laws of refraction of light
http://en.wikipedia.org/wiki/Snell's_law
Light travelling from air into glass is refracted towards the normal
The laws of refraction of light are:
1. Law of Incident Ray: The incident ray, the refracted ray, and the normal to the interface of two transparent media at the point of incidence all lie on the same plane.
2. Snell's Law: The ratio of the sine of the angle of incidence (θ₁) to the sine of the angle of refraction (θ₂) is constant, given by the equation: n₁sinθ₁ = n₂sinθ₂, where n₁ and n₂ are the refractive indices of the two media.
To determine the laws of refraction in a specific scenario, follow these steps:
1. Identify the incident ray and the interface between two transparent media.
2. Determine the angle of incidence (θ₁) of the incident ray. This angle is measured between the incident ray and the normal (a line perpendicular to the interface) drawn at the point of incidence.
3. Determine the refractive index (n₁) of the first medium and the refractive index (n₂) of the second medium.
4. Use Snell's law to find the angle of refraction (θ₂) of the refracted ray. Rearrange the equation: n₁sinθ₁ = n₂sinθ₂, to solve for θ₂.
By following these steps, you can apply the laws of refraction to any given scenario involving the interaction of light with transparent media.