Answer:
Refraction can cause three different effects which are bending of light, change in direction and change in speed!
Bending of light is when light is moving from rarer to denser medium then it moves towards the normal. If it is moving from a denser to rarer medium, then it moves away from the normal. A rainbow is an effect of refraction from light entering a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths or colors causing the effect of a beautiful rainbow!
Step-by-step explanation:
Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.