Question

light of two colours A and B pass through a glass prism a deviates more than B from its path of incidence which colour has higher velocity inside the prism and higher wavelength​

Answer 1

Whichever has a Higher wavelength will hill have more deviation so A>B

Now n=c/v

(n is refractive index)

so c=f ×lamda

so n=f×lamda /v

so n proportional to lamda and inverse to velocity so Since Lamda(A)>Lamda(B)

So Velocity of A>Velocity Of B

(Because As Velocity is in denominator when it increases total value decreases which will nullify the increase in wavelength therefore making refractive index constant .)