Write down the definitions of these phenomena: interference, diffraction, dispersion and polarization. Explain in your own words what these phenomena are. Give at least 3 examples where we can observe them.
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Interference : The definition of interference is the act of or something that obstructs or hinders.
Example : An example of an interference is a detour on the road.
Diffraction : Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. The diffracting object or aperture effectively becomes a secondary source of the propagating wave.
Example : The most striking examples of diffraction are those that involved light; for example, the closely spaced tracks on a CD or DVD act as a diffraction grating to form the familiar rainbow pattern seen when looking at a disk ... Ocean waves diffract around jetties and other obstacles.
Dispersion : Dispersion is defined as the breaking up or scattering of something.
Example : An example of a dispersion is throwing little pieces of paper all over a floor. An example of a dispersion is the coloured rays of light coming from a prism which has been hung in a sunny window.
Polarization : Polarization involves creating division or causing a group or something to be divided up into two opposing groups.
Example : An example of polarization is when a controversial political figure causes the country to
become sharply divided.