1. Reflection:
* Specular reflection: This is what happens when light bounces off a smooth, polished surface like a mirror. The angle of incidence (the angle at which the light hits the surface) is equal to the angle of reflection (the angle at which the light bounces off).
* Diffuse reflection: This occurs when light hits a rough or uneven surface, like a piece of paper or a wall. The light scatters in many directions, making the object appear dull.
2. Refraction:
* Refraction happens when light passes from one medium to another, such as from air to water. This causes the light to bend. The amount of bending depends on the angle of incidence and the refractive index of the two mediums.
3. Absorption:
* Absorption occurs when the object absorbs some or all of the light's energy. The absorbed energy can be converted into heat or used to excite electrons within the material, which might lead to the object emitting light of a different color (fluorescence).
4. Transmission:
* Transmission occurs when light passes through the object. This happens with transparent materials like glass. The amount of light that passes through depends on the material's thickness and the wavelength of the light.
Example:
Imagine shining a flashlight at a smooth, shiny surface like a mirror. The light will bounce off the surface at an angle equal to the angle at which it hit the mirror. This is specular reflection.
Now imagine shining the flashlight at a piece of white paper. The light will scatter in all directions, making the paper appear illuminated. This is diffuse reflection.
In summary, the interaction of light with a surface depends on:
* The angle of incidence
* The surface's smoothness
* The material's composition
* The wavelength of the light
These factors determine how much light is reflected, refracted, absorbed, or transmitted.
