Part $2$: Total Internal Reflection

When light enters a medium with a lower index of refraction than the medium it is leaving, it bends away from the normal. Whenever $sin{}_1\frac{n_2}{n_1},$ the light cannot enter the second medium. This is called total internal reflection. The smallest angle of incidence that has total internal reflection is called the critical angle.

a$)$ Change the material of the first medium $($where the reflected ray is$)$ to Glass using the menu box on the top right. Change the material of the second medium $($where the refracted ray is$)$ to Air using the menu box on the bottom right.

b$)$ Use the protractor tool to find the critical angle and write it in Table $2.$

$\backslash$table$[[n_1,n_2,$Critical Angle $($deg$.)],[$Glass $=1\mathrm{.}50,$Air $=1\mathrm{.}00,],[,1\mathrm{.}00,],[,1\mathrm{.}00,],[,,],[,,],[,,]]$

Table $2$