Which of the following demonstrates the result of waves traveling at
different speeds when moving from one medium to another?

A. The absence of any sound in outer space

B. The bending of light as it moves from air to water

C. The movement of ocean currents as the earth rotates

D. The up and down motion of a collided metal spring

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b. compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength