Answer:
70.87°
Explanation:
The formula for the critical angle is:
[tex]{sin\theta_{critical}}=\frac {n_r}{n_i}[/tex]
Where,
[tex]{\theta_{critical}}[/tex] is the critical angle
[tex]n_r[/tex] is the refractive index of the refractive medium.
[tex]n_i[/tex] is the refractive index of the incident medium.
n₁ is the refractive index for Carbon disulfide which is 1.63 (incident medium)
n₂ is the refractive index of sodium chloride which is 1.54 (refractive medium)
Applying in the formula as:
[tex]{sin\theta_{critical}}=\frac {1.54}{1.63}[/tex]
The critical angle is = sin⁻¹ 0.9448 = 70.87°
