Question

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

Answer 1

Answer:

In case of slab two refracting surfaces are parallel to each other and emergent rays are parallel to the incident Ray and they are closely spaced which makes it difficult to see the splitting of white light in different colors.

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Answer 2

Answer:

A rectangular glass slab is unable to produce a spectrum due to the refracting faces being parallel to each other.