Physics

Problem

Snell’s law gives the relationship between the angles of incidence

i

and refraction

r

for light passing from medium 1 (refractive index

n_1

) into medium 2 (refractive index

n_2

). Which one of the following mathematical forms is correct? a)

\dfrac{\sin i}{\sin r}=\dfrac{n_1}{n_2}

\sin i\,\sin r=\dfrac{n_2}{n_1}

\dfrac{\sin i}{\sin r}=\dfrac{n_2}{n_1}

\dfrac{\sin r}{\sin i}=\dfrac{n_2}{n_1}