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## Homework Statement

Show that for normally incident light, the intensity transmmitted through a glass slab with an index of refraction of

*n*is approximately given by:

[tex] I_T = I_0 \cdot [\frac{4 \cdot n}{(n + 1) ^ 2}]^ 2 [/tex]

## Homework Equations

Reflected intensity is given by:

[tex] I_R = I_0 \cdot [\frac{n_2 - n_1}{n_2 + n_1}] ^ 2 [/tex]

## The Attempt at a Solution

I've attempted to solve this numerous times, however, the equation that I always end up with is different than the one shown.

[tex] I_T = I_0 \cdot [\frac{4 \cdot n}{(n + 1) ^ 2}] [/tex]