A plate of glass with parallel faces having a refractive index of 1.56 is resting on the surface of water in a tank. A ray of light coming from above in air makes an angle of incidence 39.0 ∘ with the normal to the top surface of the glass. (Figure 1) There is a horizontal rectangular plate made of glass resting on the surface of the water, so a part of it is submerged. There is a ray coming from above, making an angle of theta subscript 1 with the vertical. The ray refracts in the glass, so it makes an angle of theta subscript 2, less than theta subscript 1, with the vertical. The ray refracts once more when coming out of the glass, so it makes an angle of theta subscript 3, greater than theta subscript 2, with the vertical. The refraction indices of air, glass, and water are n subscript air, n subscript glass, and n subscript water respectively. Part A What angle θ3 does the ray refracted into the water make with the normal to the surface? Use 1.33 for the index of refraction of water.
A plate of glass with parallel faces having a refractive index of 1.56 is resting on the surface of water in a tank. A ray of light coming from above in air makes an angle of incidence 39.0 ∘ with the normal to the top surface of the glass. (Figure 1)
There is a horizontal rectangular plate made of glass resting on the surface of the water, so a part of it is submerged. There is a ray coming from above, making an angle of theta subscript 1 with the vertical. The ray refracts in the glass, so it makes an angle of theta subscript 2, less than theta subscript 1, with the vertical. The ray refracts once more when coming out of the glass, so it makes an angle of theta subscript 3, greater than theta subscript 2, with the vertical. The refraction indices of air, glass, and water are n subscript air, n subscript glass, and n subscript water respectively.
Part A
What angle θ3 does the ray refracted into the water make with the normal to the surface? Use 1.33 for the index of refraction of water.
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