Answer:
Angle of light at which it will travel in the quartz is given as
[tex]\theta = 25.6^o[/tex]
Explanation:
As we know that the refractive index of a medium is the ratio of speed of light in air and speed of light in the medium
So we will have
[tex]\mu = \frac{c}{v}[/tex]
here we have
[tex]\mu = \frac{3 \times 10^8}{2.06 \times 10^8}[/tex]
[tex]\mu = 1.456[/tex]
now by Snell's law we have
[tex]n_1 sin\theta_1 = n_2 sin\theta_2[/tex]
[tex]1 sin39 = 1.456 sin\theta[/tex]
[tex]\theta = 25.6^o[/tex]
