Prism
Prism is uniform transparent medium bounded between two refracting surfaces , inclined at an angle .
Angle of Deviation
The angle sub tended between the direction of incident light ray and emergent light fay from a prism is called angle of deviation ( δ ).
Prism Formula The refractive index of material of prism
Dispersion of Light
The splitting of white light into its constituent colours in the sequence of VIBGYOR , on passing through a prism . is called dispersion of light .
The refractive index μ v > μ R therefore violet colour deviates most and red colour deviates least . i . e ., δ v > δ R .