Electromagnetic Waves Test Prep

Electromagnetic waves are: a. transverse waves. b. longitudinal waves.

• transverse waves

• longitudinal waves

Electromagnetic waves need a medium to travel through

• True

• False

Which of these electromagnetic waves has the shortest wavelength?

• Infrared waves

• Light waves

• Radio waves

• X-rays

• Ultraviolet waves

Compared to the wavelength of ultraviolet waves, the wavelength of infrared waves is:

• the same.

• shorter.

• longer.

Compared to the velocity of radio waves, the velocity of visible light waves is:

• slower

• faster

• the same

The source of all electromagnetic waves is:

• magnetic fields.

• heat.

• electric fields.

• vibrating charges.

• none of the above.

Which of the following are fundamentally different from the others?

• Gamma rays

• Radio waves

• Sound waves

• Light waves

• X-rays

The main difference between a radio wave and a light wave is its:

• speed.

• wavelength.

• both A and B

• none of the above.

Fill in the blank: Electromagnetic waves can travel through a ______.

• medium

• vacuum

• solid

• liquid

What is the main difference between a radio wave and a sound wave?

• one is electromagnetic and the other is mechanical

• amplitude

• energy

• frequency

• wavelength