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In Fig 32-31 a light ray in air is incid...

In Fig 32-31 a light ray in air is incident on a flat layer of material 2 that has an index of refraction `n_(2) =1.5` . Beneath material 2 is material 3 with an index of refraction `n_(3)` . The ray is incident on the air -material 2 interface at the Brewster angle for that interface . The ray of light refracted into material 3 happens to be incident on the material 2 -material 3 interface at the Brewster angle for that interface . What is the value of `n_(3)` ?

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`n_(3) =1.0`
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