When an object is heated the motion of the particles increases as the particles become more energetic. If it is cooled the motion of the particles decreases as they lose energy.
Electromagnetic radiation is a type of energy that is commonly known as light. Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108<span>meters per second im pretty sure through a vacuum. We call this the speed of light nothing can move faster than the speed of light according to electromagnetic wave lengths. hope i could help if not please explain that way i can :)</span>