In figure, light refracts from material 1 to a thin layer of material 2, crosses that layer, and then is incident at the critical angle on the interface between materials 2 and 3. (a) What is the angle theta? (b) if theta is decreased, is there refraction of light into material 3?

In figure, light refracts from material 1 to a thin layer of material

1.	In figure, light refracts from material 1 to a thin layer of material 2, crosses that layer, and then is incident at the critical angle on the interface between materials 2 and 3. (a) What is the angle theta? (b) if theta is decreased, is there refraction of light into material 3?
Answer» SOLUTION : `mu_1 sin i_1=mu_2sin i_2=mu_2sin theta_C` `(1.6) sin THETA=(1.80)(1.30/1.80)` `:.theta=sin^-1(13/16)` If `theta` decreased, then `i_2` will decrease from the VALUE `theta_C.` Hence, refraction will take place in medium-3.

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In figure, light refracts from material 1 to a thin layer of material 2, crosses that layer, and then is incident at the critical angle on the interface between materials 2 and 3. (a) What is the angle theta? (b) if theta is decreased, is there refraction of light into material 3?

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