Refraction

#Physics

Topics

• Refractive Index
• Snell's Law

$\theta_\text{crit}=\sin^{-1}(\frac{n_b}{n_a})$

• When an light ray makes an angle $\theta_\text{crit}$ with the normal of the medium surfaces, the resulting light ray travels along the seam between the mediums rather than reflecting or refracting
• $n_a$ is the medium that the light enters from
• $n_b$ is the medium that the light enters