Electromagnetic Waves and Their Properties

What are electromagnetic waves made up of?

• Sound and water waves

• Electric and magnetic fields

• Air and water

• Light and sound

What is an example of an electromagnetic wave?

• Sound

• Water

• Sunlight

• Air

How do electromagnetic waves travel through space?

• They need air

• They need water

• They need a medium

• They can travel through a vacuum

Why can sunlight reach Earth from the Sun?

• Because it travels through air

• Because it travels through water

• Because it is an electromagnetic wave

• Because it needs a medium

What is the speed of electromagnetic waves in a vacuum?

• 150,000,000 meters per second

• 300,000,000 meters per second

• 450,000,000 meters per second

• 600,000,000 meters per second

How long does it take for light from a flashlight to reach the Moon?

• Just over a minute

• Just over an hour

• Just over a second

• Just over a day

What happens to the frequency if the wavelength is long?

• The frequency is high

• The frequency is low

• The frequency is medium

• The frequency does not change

What is the relationship between wavelength and frequency?

• Long wavelength means high frequency

• Short wavelength means low frequency

• Long wavelength means low frequency

• Wavelength and frequency are unrelated

What characteristic of radio waves makes them suitable for carrying music and voice over long distances?

• Short wavelengths and high frequencies

• Long wavelengths and low frequencies

• Short wavelengths and low frequencies

• Long wavelengths and high frequencies

What are microwaves primarily used for?

• Carrying music over long distances

• Heating food by exciting water molecules

• Creating images of bones

• Powering solar panels