Review of Electromagnetic Waves

How does the radiation(energy) of an electromagnetic wave travel?

• in a straight line

• at a right angle to the medium

• going forward from the source and spreading out.

The purpose of all waves is to change the matter that it goes through.

• False

• True

EM waves are just like mechanical waves as they both need a medium to move their energy.

• True

• False

Which EM wave has the least radiation (energy)?

• x-rays

• microwaves

• visible light

• gamma rays

Which EM wave has the most amount of radiation (energy)?

• visible light

• microwaves

• ultraviolet rays

• radio waves

As the wavelengths of the EM waves get shorter/microscopic, what happens to the amount of radiation (energy)?

• nothing, the radiation/energy stays the same in all the waves

• the amount of radiation/energy decreases

• the amount of radiation/energy increases

Humans had to figure out how to make and manipulate electromagnetic waves.

• False

• True

Weather maps are made using which EM wave?

• radio waves

• microwaves

• infrared waves

• visible light

This thermometer uses which EM waves to take your temperature?

• Radio waves

• Infrared waves

• microwaves

• ultraviolet rays

To vibrate the water molecules inside the food, microwaves must do this inside the oven.

• refract

• reflect

• diffract