A ray of red light in air (λ-650 nm) is incident on a semicircular block of clear plastic (n = 1.51 for this light), as

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A ray of red light in air (λ-650 nm) is incident on a semicircular block of clear plastic (n = 1.51 for this light), as shown above. The ray strikes the block at its center of curvature at an angle of incidence of 27°. Part of the incident ray is reflected and part is refracted at the first interface. On paper, print or redraw the figure seen. A. Determine the angle of reflection at the first interface. Draw and clearly label the reflected ray on the diagram. B. Determine the angle of refraction at the first interface. Draw and clearly label the refracted ray on the diagram. C. Determine the speed of the light in the plastic block. D. Determine the wavelength of the light in the plastic block. E. The light exits the plastic through the semicircular side. Draw in the ray showing the light exiting back into the air. If any, what will the angle change be as it enters the air? Justify.