explain how Dispersion of light caused by one prism can brought by another prism???
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When Light is dispersed by a prism just the speed of each wavelength is slowed by the prism at a particular angle . When we use another prism at the same angle the light passes through the prism again and refraction causes all the waves to combine once more.
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The refractive index of many materials (such as glass) varies with the wavelength or color of the light used, a phenomenon known as dispersion. This causes light of different colors to be refracted differently and to leave the prism at different angles, creating an effect similar to a rainbow.
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