Sound waves are longitudinal waves. Nature of Light Light is a form of energy. Light can also be converted to other forms of energy. This can be illustrated by the use of a magnifying glass to change sunlight into heat to ignite a piece of paper. Light travels in a straight line.
White light is a mixture of all colors.
Reflection and Refraction of Light Light will bend as it travels from one medium to another. The bending of light is called refraction. The Law of Reflection states that the angle of incidence is equal to the angle of reflection. These angles are measured from a line perpendicular, or normal, to the surface. Optics Mirrored surfaces are based on the reflection of light.