Light+energy

Light is a wave, but sometimes acts as if it were a stream of particles, light can diffract, refract and reflect.
 * Light energy**

Refraction is the change in direction of a wave due to a change in its speed. Reflection is the change in direction of a wave front at an interface between two different media so that the wavefront returns into the medium from which it originated.
 * Refraction**
 * Reflection**
 * Speed of the light:** Its value is exactly 299,792,458 metres per second.

refraction producing an optical illusion
 * Bending the light**

In optics, a prism is a transparent optical element with flat, polished surfaces that refract light.
 * What colour can light split into**

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