Refraction through Glass and Water A plate of glass with parallel faces having a

Question

Refraction through Glass and Water A plate of glass with parallel faces having a refractive index of 1.50 is resting on the surface of water in a tank. A ray of light coming from above in air makes an angle of incidence 36.0 degree with the normal to the top surface of the glass. (Figure1.) What angle theta 3 does the ray refracted into the water make with the normal to the surface? Use 1.33 for the index of refraction of water. Express your answer in degrees.

Explanation / Answer

n1 sin(theta1) = n2 sin(theta2) = n3 sin(theta3) ==> sin(theta3) = n1 sin(theta1)/n3 = 1*sin(36)/1.33 ==> theta3 = 26.2 degrees

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