(iii) What are different types of dispersion of light.
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In an optical medium, such as fiber, there are three types of dispersion, chromatic, modal, and material. Chromatic dispersion results from the spectral width of the emitter. The spectral width determines the number of different wavelengths that are emitted from the LED or laser.
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These colors are often observed as light passes through a triangular prism. Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.
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