Answer:
26.71°
Explanation:
Using Snell's law as:
[tex]n_i\times {sin\theta_i}={n_r}\times{sin\theta_r}[/tex]
Where,
[tex]{\theta_i}[/tex] is the angle of incidence ( 54.0° )
[tex]{\theta_r}[/tex] is the angle of refraction ( ? )
[tex]{n_r}[/tex] is the refractive index of the refraction medium (glass, n=1.8)
[tex]{n_i}[/tex] is the refractive index of the incidence medium (air, n=1)
Hence,
[tex]1\times {sin54.0^0}={1.8}\times{sin\theta_r}[/tex]
Angle of refraction = [tex]sin^{-1}\ 0.4495[/tex] = 26.71°
