Diffraction
Diffraction is used in the sense of physics, light, sound, and passing through some of the obstacles encountered by radio-electric waves. It is formed by the passage of waves from small spaces, obstacles or sharp edges. Waves deviate from their linear paths as they pass through such places. It reveals the wave character of the light. This can happen in all kinds of waves, such as water, sound, light, or radio waves. A simple example of the diffraction is that when speaking into a pipe, the sound coming from the other side of the pipe spreads in every direction. However, the water from the garden hose spreads as a straight line. Diffraction should not be confused with breaking; ripples move at different velocities in environments with different densities, breaking at an angular angle where the propagation velocity is different. To be diffracted, the size of the space that the waveguide will pass through must be close to or smaller than the wavelength of the waveguide. If there is more than one diffraction point, a diffraction pattern occurs because the waves emitted from these points are mutually extinguished or reinforced.