Answer:
0.002°
Explanation:
you can use Snell law to compute the angle of refraction for both cases, red and blue.
By using the Snell law for blue color you have
[tex]n_{d}sin\theta_d=n_csin\theta_c\\\\\theta=sin^{-1}(\frac{n_csin\theta_c}{n_d})=sin^{-1}(\frac{(1.531)sin23.2\°}{2.444})=0.246\°[/tex]
and for the red color you obtain:
[tex]\theta=sin^{-1}(\frac{n_csin\theta_c}{n_d})=sin^{-1}(\frac{(1.520)sin23.2\°}{2.410})=0.248\°[/tex]
finally by getting the difference between these angles you obtain:
[tex]0.248\°-0.246\°=0.002\°[/tex]
hence, the angle difference is 0.002°
