and Refraction cont
Is what happens when light travels out in many different directions. a good example of this is the color of the sky, blue and violet are the shortest wavelengths.
Speed of light in a vacuum is constant at 300,000,000 m/s. the speed of light slows down when it passes through a medium. the biggest the wavelength is, faster the light moves in a medium.
Light changes direction when it changes mediums, changes in direction or change in angles is known as refraction.