Question

PLLLLLLLLLLLZ HELP 15 POINTS

Answer 1

Answer:

The variables $\eta_1$ and $\eta_2$ depend upon the materials involved.

Explanation:

Snell's law of refraction for light traveling from one medium to another is given as:

$\eta_1\times \sin \theta_1=\eta_2\times \sin \theta_2$

Where,

$\eta_1\rightarrow \textrm{refractive index of medium 1}\\\eta_2\rightarrow \textrm{refractive index of medium 2}\\\theta_1\rightarrow \textrm{angle of incidence in medium 1}\\\theta_2\rightarrow \textrm{angle of incidence in medium 2}$

Now, the refractive index of the medium depends only upon the material of the medium. It is the property of the medium.

So, in Snell's law of refraction, the variables $\eta_1$ and $\eta_2$ depend upon the materials of the medium involved.