5. A rectangle, surrounded by air, is made of two equal triangular pieces of different materials. The given angle has the value 0 = 37°. The index of refraction is ng = 1.25 in material X (the white triangle) and is ny = 1.875 in material Y (the shaded triangle). A light beam is incident perpendicularly on the left side of the rectangle and passes straight through to the diagonal interface, as shown. It refracts into material X, strikes the right side of the rectangle and refracts into the air. Determine the angle at which the light beam refracts into the air. Take n= 1.000 to be the index of refraction of air.

5. A rectangle, surrounded by air, is made of two equal triangular pieces of different materials. The given angle has the value 0 = 37°. The index of refraction is ng = 1.25 in material X (the white triangle) and is ny = 1.875 in material Y (the shaded triangle). A light beam is incident perpendicularly on the left side of the rectangle and passes straight through to the diagonal interface, as shown. It refracts into material X, strikes the right side of the rectangle and refracts into the air. Determine the angle at which the light beam refracts into the air. Take n= 1.000 to be the index of refraction of air.