Question

When white light is incident on a glass slab and emerges after refraction, it does not form a spectrum. Explain?​

Answer 1

Answer:

When these dispersed colors of light emerge from the opposite face of the glass slab, the emerging rays of light again combine with each other to form white light as the refraction does not deviate these seven colors. Hence, the light emerging from the second face of the glass slab does not produce any spectrum.

Explanation:

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Answer 2

glass slab is made up of two prism