Aslinky is stretched across a classroom and moved up and down at a frequency of 3 hz. if the corresponding wave velocity is 6.6 m s , determine the wavelength of the slinky wave. a) 0.45 m b) 2.2 m c) 9.9 m d) 19.8 m

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?