(b) A beam of light consisting of red, blue and yellow is incident of the prisms as shown below. Complete the diagram to show refracted and emergent ray.

Dear student

In  1st Fig. the ray is incident normally, so it does not disperse in the prism but the emergent beam gets dispersed. In 2nd Fig, dispersion occurs both inside and outside the prism.

Consider the following diagram

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What are you looking for?