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What causes of diepersion?

Answer» Visible light is made of a mixture of frequencies of light. What we see as white light includes all the colors of the rainbow, from the high frequency violet to the low frequency red. When white light is passed through a triangular glass prism, it is separated into a spectrum of colors: red, orange, yellow, green, blue, indigo and violet. This process of separating white light into colors is known as dispersion.Two causes of dispersion of light are:-Optical Density :Optical density is a term that describes how light behaves when it passes through transparent material. If something has a high optical density, then it has a greater ability to slow light down as it passes through. As light strikes something transparent, it is absorbed by the material\'s atoms, then released. This causes the light to pass from atom to atom through the material. However, the process of absorption and emission can be slightly faster or slower, depending on the light\'s wavelength. Light with shorter wavelengths is slowed down more than light with longer wavelengths.Refraction :When light passes at an angle from one material to another, it will bend, or refract. This happens because the two materials have different optical densities. For example, when light passes from air to glass, the glass has a greater optical density than air. This causes the light to bend closer to the normal, which is an imaginary line perpendicular to the surface. When the light reaches the other side of the glass and exits into the air, moving from a greater optical density to a lesser one, the light bends away from the normal.
According to neton ,light is a heterogeneous mixture of different colours,which are deviated by different extents,when they are passed through a prism. ( Prism doesn\'t. Produce the. Different colours of the spectrum from White light but it merely separate white light in to it\'s Constituents colours.


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