4.2 Electromagnetic Waves

What is an Electromagnetic Wave?

• A type of wave that is made of electricity and magnets that travels through space at the speed of light

• A type of wave resulting from a changing electric and magnetic field that travels through space at the speed of light.

• A type of wave moves through any medium at the speed of light.

• A type of wave that is made of electrons that move at the speed of light.

True or False: EM waves (like all other waves) require some sort of physical medium to travel through

• FALSE

• TRUE

If EM Waves do not require a medium.....then what are they traveling through??

Which are other names that we call Electromagnetic Waves? (SELECT 2 THAT ARE CORRECT)

• Electromagnetic Radiation

• Light

• Electricity

• Magnetism

What are the 2 main properties that describe an electromagnetic wave? (SELECT 2 OPTIONS THAT ARE CORRECT!)

• Each EM wave has the same frequency because all types are light.

• All EM waves travel at the speed of light.

• Each EM wave is described by its frequency based on its amount of energy.

• The speed of the EM wave is dependent on its energy. High energy EM waves travel faster.

If an EM wave has a high frequency, what other property will also always be high in value? (Choose 1 option)

• Its energy.

• Its wavelength

• Its amplitude.

We have a device that is detecting EM waves, which has a very low frequency.

Which of the following is true?

• The wavelength of the EM wave will be very long.

• The wavelength of the EM wave will be very short.

• The energy of the EM wave will be very high.

• The speed of the EM wave will be much lower.

EM waves come in a large range of values of frequency (or wavelength). What do you call this?

• The Electromagnetic Spectrum

• The Electromagnetic Induction

• The Electromagnetic Frequency

• The Electromagnetic Light Radiation

Consider the Electromagnetic Spectrum which is classified by different types based on wavelength (or frequency).

Which option has types of EM waves from longest wavelength to shortest?

• Radio, Visible, Infrared, X-Ray

• Radio, Microwave, Ultraviolet, Gamma Ray

• Microwave, Radio, Visible, Gamma Ray

• Gamma Ray, Visible, Infrared, Radio

Consider the Electromagnetic Spectrum which is classified by different types based on wavelength (or frequency).

What do we call the narrow band of frequencies associated with colors we see?

• Infrared

• Visible Light

• Ultraviolet