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# Concepts of dispersion of light through two prisms.

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This is a conceptual questions, so don't use Snell's law or any numbers.

Two identical prisms made of dispersive glass, are placed as shown and a narrow beam of white light enters from the left. If the prisms are in the configuration for minimum deviation for green light, draw what happens to, say , the 4 colors of red, yellow, green and blue light-all the way through both prisms. Explain the picture in words too. What happens as the distance "d" between two prisms is made very small.

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https://brainmass.com/physics/optics/concepts-dispersion-light-through-two-prisms-105584

#### Solution Preview

This is a conceptual questions, so don't use snell's law or any numbers.

Two identical prisms made of dispersive glass, are placed as shown and a narrow beam of white light enters from the left. If the prisms are in the configuration for minimum deviation for green light, draw what happens to, say , the 4 colors of red, yellow, green and blue light-all the way through both prisms. Explain the picture in words too. What happens as the distance "d" between two prisms is made very small.

As we know that the refractive index of a substance depends on wave length of light. With decrease in wavelength refractive index increases and hence for red light it is minimum and for violet it ...

#### Solution Summary

The solution deals with the consequences when the light dispersed from a prism passes through another prism placed in such a way that their dispersive angles are in opposite direction.

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