Harlow Shapley found the Milky Way was Group of answer choices centered on the Earth. much larger than previously thought. much smaller than previously thought. rapidly expanding. uniformly spherical in shape.

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?