Refraction law: discovered by Dutch mathematician Snitch, it is a law that determines the direction of refracted light in light refraction. "Refraction law" means that when light enters the second medium (refractive index n2) from the first medium (refractive index n 1), part of the light will be refracted on the smooth interface after entering the second medium from the first medium.
[Features]: The refraction of light, like the reflection of light, occurs at the junction of two media, except that the reflected light returns to the original medium, and the refracted light enters another medium. Because the propagation speed of light in two different substances is different, the propagation direction changes at the junction of two media, which is the refraction of light. In refraction, the optical path is reversible. At the junction of the two media, not only refraction but also reflection will occur. For example, in water, some light will be reflected back and some light will enter the water. The speed of reflected light is the same as that of incident light, while the speed of refracted light is different from that of incident light.
【 law of refraction of light 】:
1. Refracted light, incident light and normal are in the same plane. (three lines * * * surface)?
2. Refracted light and incident light are separated on both sides of the normal. (every two lines)?
3. When light is obliquely incident from air to other media, the refraction angle is smaller than the incident angle. ?
4. When light enters the air obliquely from other media, the refraction angle is greater than the incident angle.
5. The refraction angle increases with the increase of incident angle. ?
6. When the light is perpendicular to the surface of the medium, the propagation direction remains unchanged, and the incident angle and refraction angle are both zero.