Question

What is the electromagnetic spectrum?

a magnetic field
when electricity is used to cause an object to move
the range for all sound
the range for all light

Answer 1

Light is basically a moving electric and magnetic field which is why it's called an electromagnetic wave. The way the fields oscillate is at different frequencies, and this gives light different properties. This is what you see in the spectrum, the range for all light and what it can be, whether it's color you see or if its x-rays, radio waves, or microwaves. http://www2.lbl.gov/images/MicroWorlds/EMSpec.gif