Post #25 - Refraction

Today in class we learned about refraction. Refraction is the changing of wave speed due to changes in medium. I took a picture of glasses because the lens is an example of refraction. Snails law states that when moving from a fast medium to a slower medium, light will bend toward the normal. When moving from a slow to fast medium, light will bend away from the normal. Glasses work by the shape of the lens. The shape of the lens changes to focal point which helps one see with better vision. Refraction also happens in torching. Since the index of refraction of water is 1.33, the light will bend toward the normal and the fish will actually be closer to you because of refraction. This is similar to the passenger side mirror. The mirror says "objects in mirror are closer than they appear." This is because of refraction.