Why prism show dispersion where glass slab doesn\'t?

1.	Why prism show dispersion where glass slab doesn\'t?
Answer» Angle betweem incudent and reflected ray What do you mean by dispersion angel? Because , In a prism, the dispersion occurring at one face in enhanced by the refraction at the other face, but in a glass slab the dispersion occurring at one face is neutralized or constant Due to variation in dispersion angle

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