Physics, asked by Ramcharan, 1 year ago

Why is dispersion not observed in a glass slab?

Answers

Answered by farsana

2

If light is to undergo dispersion, there should always be deviation for light rays after refraction. in a glass prism this takes place, hence light is dispersed by the prism. But, in the case of a glass slab,there is no deviation for light rays, as incident and emergent rays are parallel. hence, light cannot be dispersed by glass slab.

Ramcharan: I dont think thats correct

Ramcharan: I got the ans from my teacher just now

farsana: Oh

Ramcharan: Its coz glass slab is like a prism and an inverted one put together

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