1. Interference:
- If the light rays are coherent (meaning they have the same frequency and phase), they can interfere with each other. This can lead to:
- Constructive interference: When the crests of the waves align, the amplitude of the light increases, resulting in brighter light.
- Destructive interference: When the crests of one wave align with the troughs of another, the amplitude decreases, resulting in dimmer light or even darkness.
2. Diffraction:
- When light rays pass through a narrow opening or around an obstacle, they spread out. This bending of light waves is called diffraction.
3. Reflection:
- When light rays hit a smooth surface, they bounce off at an angle equal to the angle of incidence. This is called reflection.
4. Refraction:
- When light rays pass from one medium to another (like from air to water), they change direction. This bending of light is called refraction.
5. Polarization:
- Light can be polarized, meaning the oscillations of the electric field are restricted to a particular plane. When polarized light rays meet, their polarizations can interact, leading to changes in intensity.
In summary: What happens when light rays meet depends on several factors, including the nature of the light, the medium it's traveling through, and the surfaces it encounters. The resulting phenomenon can be interference, diffraction, reflection, refraction, or polarization.
