White light is passed through a prism of angle 5^@ IF the refractive indices for red and blue colours are 1.641 and 1.659 respectively, calculate the angle of dispersion between them.

White light is passed through a prism of angle 5^@ IF the refractive i

1.	White light is passed through a prism of angle 5^@ IF the refractive indices for red and blue colours are 1.641 and 1.659 respectively, calculate the angle of dispersion between them.
Answer» SOLUTION :As for small ANGLE of prism `DELTA=(mu-1)A` `delta_b=(1.650-1) times 5^@=3.295^@` And `delta_T=(1.641-1) times 5^@=3.205^@` SO `theta=delta_b-delta_r=3.295^@-3.205^@=0.090^@`