The Laws of Refraction of Light and Refractive Index (Leaving Cert Physics): Quizzes

Light travels at different speeds in different media

Incident ray, normal, refracted ray

$\frac{\sin i}{\sin r} = n$

Line perpendicular to surface

2.42

$n = \frac{c}{v}$

Willebrord Snellius in 1621

Toward the normal

$n_{12} = \frac{n_2}{n_1}$

1.0 (vacuum)

Light travels slower