Materials that light passes through Light easily passes through air and glass. They are called transparent . It is obvious that it doesn't pass through materials like steel or wood. There are some materials that only allow some of the light to pass through them. If only a percentage of the light can pass through, the material is called translucent .
Some materials only allow selected wavelengths to pass through.
Colored glass may block some colors, while allowing only one or two specific wavelengths to pass through it. A wave model of light can be used to explain diffraction, interference, and polarization, all of which provide strong evidence for the wavelike nature of light. Diffraction Diffraction is the bending of light around the edge of an object or spreading of light in an arc after passing through a tiny opening. The same thing happens with light at edges. Another example of diffraction can be seen by looking at the tiny grooves in a phonograph record.