A beam of light is incident upon a stack of four flat transparent materials with indices of refraction of n1 =1.8, n2 =1.5 , n3 =1.3 , and n4 =1.2, see figure. a. If θ1 is 29o, what angle θ2 does the beam make to the normal when in emerges into the air after passing through the entire stack? b. What must the incident angle θ1 be to have total internal

A beam of light is incident upon a stack of four flat transparent materials with indices of refraction of n1 =1.8, n2 =1.5 , n3 =1.3 , and n4 =1.2, see figure.

a. If θ1 is 29o, what angle θ2 does the beam make to the normal when in emerges into the air after passing through the entire stack?

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b. What must the incident angle θ1 be to have total internal reflection at the surface between medium n4 and n?

0 0₂ n₁ n₂ n3 n4 n=1.00

 

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