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प्रश्न
Can you ever have a situation in which a light ray goes undeviated through a prism?
उत्तर
There is only one such situation. Light rays go undeviated through a prism only when the prism is kept in a medium that has the same refractive index as that of the prism itself. In all other situations, there will always be some minimum deviation in the path of a light ray passing through the prism.
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