The -plane separates two media and with refractive indices and

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

The

xz

-plane separates two media

A

and

B

with refractive indices

\mu_1

and

\mu_2

, respectively. A ray of light travels from

A

and

B

. Its directions in the two media are given by the unit vectors

\hat{r}_A = a\hat{i} + b\hat{j}

and

\hat{r}_B = \alpha\hat{i} + \beta\hat{j}

respectively, where

\hat{i}

and

\hat{j}

are unit vectors in the

x

and

y

-directions. Then, *have to apply the slab formula* (a)

\mu_1 a = \mu_2 \alpha

(b)

\mu_1 \alpha = \mu_2 a

(c)

\mu_1 b = \mu_2 \beta

(d) None of the above