Chapter 18: Electromagnetic Waves

produced by charged particles in motion, travel through space, transferring energy

(has an s)

an electromagnetic wave is composed of two forces fields--[term] and [term]

• gravity and friction
• electric and magnetic
• light and sound
• positive and negative

a [term] [term] exerts a force on other magnets, causing them to line up along the direction of the magnetic field.

the [term] [term] surrounding a charged particle exerts a force on all other charged particles in the field.

a [term] charged particle is surrounded by an electric field and a magnetic field

• positively

• negatively

• still

• moving

as a charged particle moves [term] and [term], it produces an electromagnetic wave.

• speeds up, slows down
• increases, decreases
• left and right

• up and down

one complete vibration of the charged particle up and down creates on [term] in an electromagnetic wave.

energy carried by an electromagnetic wave

electromagnetic waves travel at the speed of light, [number] km/s, in space.

• 300,000
• 250,000
• 299,792
• 280,000

electromagnetic waves have a series of different frequencies and wavelengths called the [term] [term]