8.7.1-Electromagnetic Radiation

Chapter 7
Electromagnetic Waves

Chapter 7-Electromagnetic Waves
Lesson 8.7.1-Electromagnetic Radiation your name

Essential Questions:

1. How do electromagnetic waves form?

2. What are some properties of electromagnetic waves?



Be sure to answer the questions as you complete the quiz. Turn in with your MASTERY SCORE (80% minimum or REDO) at the end.

Lesson 8.7.1
Electromagnetic Radiation

Essential Questions
1. How do electromagnetic waves form

EM Waves can travel in a vacuum! Mechanical waves (sound waves) CANNOT!!!

Multiple Choice

All waves carry...

• Energy

• Matter

• Light

• Particles

Multiple Choice

How are electromagnetic waves different from other waves?

• They have very short wavelengths

• They can travel through empty space

• They transmit energy instead of matter

• They can change direction by reflection

Multiple Choice

The type of wave that can travel through both matter AND empty space:

• Mechanical Waves

• Electromagnetic Waves

Radiant

any electromagnetic (EM) radiation.

Radio Waves

Microwaves

Infrared

VISIBLE LIGHT

Ultraviolet

X-Rays

Gamma Rays

Multiple Choice

Which is a type of radiant energy?

• Microwaves

• Ocean waves

Multiple Choice

The sun gives off __________ energy.

• mechanical

• electrical

• radiant

Multiple Choice

How fast do electromagnetic waves travel?

• 300,000 km per second

• 350,000 km per second

• 325,000 km per second

• 375,000 km per second

Multiple Choice

A photon is a bundle of electromagnetic energy and the basic unit that makes up all light.

• True

• False

Multiple Choice

The name for the range of electromagnetic waves when placed in order of increasing frequency is

• Visible Light Spectrum

• Ultraviolet Light Spectrum

• Electromagnetic Spectrum

• Magnetic Spectrum

Multiple Choice

Long wavelengths have low energy and

• high frequency

• no frequency

• low frequency

Multiple Choice

The shorter a wavelength the _______ the energy.

• higher

• lower

Multiple Choice

Infrared rays are not invisible.

• True

• False

Lesson 8.7.1
Electromagnetic Radiation

Essential Questions
2. What are some properties of electromagnetic waves?

Timeline in the Development of Electromagnetic waves

• Alessandro Volta

• Hans Christian Oersted

• Andre Marie Ampere

• Michael Faraday

• James Clerk Maxwell

• Heinrich Hertz

Electromagnetic waves or EM waves

waves that are created as a result of vibrations between an electric field and a magnetic field

Transmission and propagation of EM waves

The transmission of electrical energy by wires, the broadcasting of radio signals, and the phenomenon of visible light are all examples of the propagation of electromagnetic energy. Electromagnetic energy travels in the form of a wave.

Open Ended

Will you give some properties of EM waves.

common properties of EM waves

• moving waves carry energy

• transverse waves

• travel in the same speed 3 x 10^8 m/s through vacuum

• can be reflected, refracted, or diffracted

Multiple Choice

Which is true about electromagnetic waves?

• All travel at the same speed.

• All have the same frequency.

• All have the same wavelength

• All transport energy but not momentum

Multiple Choice

Which among the electromagnetic waves are emitted by hot objects?

• infrared rays

• microwaves

• radio waves

• x-rays

Multiple Choice

Which of the following do EM waves transport?

• electric charge

• energy

• frequency

• wavelength

Properties of
Light Waves

Refraction is the tendency of of

waves to change direction of their

waves when passing through a
medium with different density.

This is the property that

microscopes and telescopes use to

work!

• ​Electromagnetic waves are waves that can travel through an empty space or vacuum

• It is made up of electric and magnetic fields

• They are TRANSVERSE WAVES

​​Electromagnetic Waves

• They travel at right angles

• They have crests, troughs, amplitude, wavelength, frequency, and energy

• They do not require a medium to travel through

Multiple Select

Click the Following that are true about

ELECTROMAGNETIC WAVES.

• They are longitudinal waves.

• They can travel through an empty space or vacuum and do not require a medium to go through.

• Made up of electric and magnetic fields.

• Radio Waves have the longest wavelength transmits ener

​​Electromagnetic Spectrum

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​Duplicate this text as many times as you would like.

Have a nice day. Happy teaching!

​​Subheader

Multiple Select

Which of the following are true of electromagnetic waves?

• They all travel at the same speed

• They need a medium to travel

• Only a small portion of them are visible to humans

• They all carry the same amount of energy

Multiple Choice

The image shows the tendency of a wave to spread out when passing through a narrow gap. This effect is called...

• diffraction

• polarization

• transmission

• absorption

Multiple Choice

Different materials reflect, absorb, and transmit light waves in different ways. Which of these behaviors causes a material to get hotter in the sun?

• Reflect

• Absorb

• Transmit

Multiple Select

Light refraction causes the straw to appear in a different position inside this cup of water. Which of the following are also examples of refraction?

• Camera lenses

• Rainbows after rain

• Neon Lights

• Eye glasses

Multiple Choice

When a light wave hits these glasses, what may happen to it?

• It is reflected

• It is absorbed

• It is transmitted

• All of the above

Multiple Choice

The range of electromagnetic waves placed in a certain order is called the

• electromagnetic spectrum.

• electromagnetic wavelength.

• electromagnetic frequency.

• electromagnetic field.

Multiple Choice

Which waves have some electrical properties and some magnetic properties?

• longitudinal waves

• transverse waves

• mechanical waves

• electromagnetic waves

Multiple Choice

Electromagnetic waves can transfer energy without a(n)

• medium.

• electric field.

• magnetic field.

• change in either a magnetic or an electric field.

Multiple Choice

In a vacuum, all electromagnetic waves have the same

• wavelength.

• speed.

• frequency.

• amplitude.

Multiple Choice

Radio waves carry information from a broadcasting station to your radio or television.

• True

• False

Multiple Choice

Electromagnetic waves are classified as longitudinal waves.

• True

• False

Multiple Choice

A thermogram identifies the warm and cool parts of an object by using ____________________.

• infrared rays

• visible light

• ultraviolet rays

• radio waves

Multiple Choice

Global Positioning System signals can tell you....

• what television station you are tuned to.

• your exact location on Earth.

• how many satellites are in orbit.

• who is sending a message to your pager.

Multiple Choice

Which letter indicates X-rays?

• A.

• B.

• C.

• D.

Multiple Choice

EM waves are always____________

• Transverse
• Compression
• Longitudinal
• Seismic

Multiple Choice

Wavelength and Frequency are related in that...

• they are always the same
• when one increases, the other decreases (inversely proportional)
• no correlation
• they are both confusing

Multiple Choice

These are the only wavelengths the human eye can see:

• X-rays
• Radio Waves
• Visible Light
• Gamma Waves

Multiple Choice

The number of wave cycles to pass a given point per time unit

• Gamma Waves
• Meters
• Frequency
• Radio Waves

Multiple Choice

The orange line is measuring the _________________________.

• wavelength
• amplitude
• crest
• trough

Multiple Choice

REFRACTION

• WHEN LIGHT BOUNCES OFF AN OBJECT

• WHEN LIGHT IS ABSORBED

• LIGHT WAVES ARE BENT DUE TO A CHANGE IN MEDIUM

• WHEN A FRACTION IS BROKEN

Multiple Choice

DIFFRACTION

• WAVE MOVES AROUND A BARRIER SUCH AS LAND OR GOES THROUGH AN OPENING

• LIGHT IS BENT

• LIGHT IS ABSORBED

• LIGHT IS REFLECTED

Multiple Choice

Which color reflects the most light?

• Black
• White
• Yellow

Multiple Choice

Light is a type of energy that travels as an ______________ ____________.

• longitudinal wave
• electric current
• electromagnetic wave
• magnetic wave

Multiple Choice

The color of emitted light with the LONGEST wavelength is

• violet

• green

• red

• indigo

Multiple Choice

The color of emitted light with the SHORTEST wavelength is

• violet

• green

• red

• indigo

Multiple Choice

This is an example of...

• Reflection
• Refraction
• Polarization
• Spectrum

Multiple Choice

how does diffraction work

• it goes through water and air

• is a beam of light stopping at a wall

• it bounces off of light

• is the bending of light as it passes around the edge of an object

Multiple Choice

witch picture is diffraction

Multiple Choice

What happens when light hits a mirror?

• it makes a color
• it reflects
• it makes a rainbow
• it passes through

Multiple Choice

• Constructive Interference
• Destructive Interference

Multiple Choice

The combination of two or more waves that result in a single wave

• A. diffraction
• B. resonance
• C. reflection
• D. interference

Multiple Choice

When the crests of one wave overlap the crests of another wave or waves, this occurs.

• A. diffraction
• B. destructive interference
• C. constructive interference
• D. resonant frequencies

Multiple Choice

The fact the two angles are the same is an example of....

• Refraction
• Angle of Incidence
• Law of reflection
• Magnification

Multiple Choice

All waves carry

• energy
• light 
• matter
• particles

Multiple Choice

Some electromagnetic waves are extremely harmful

• true

• false

Multiple Choice

All electromagnetic waves travel at the same speed across space

• true

• false

Multiple Choice

All electromagnetic waves have the same wavelength

• true

• false

Multiple Choice

The frequency of an electromagnetic wave is inversely related to its wavelength

• true

• false

Multiple Choice

Electromagnetic waves travel at the same speed in all media

• true

• false

Multiple Select

Properties of electromagnetic waves include

• speed

• wavelength

• frequency

Multiple Choice

Light slows down when it

• travels across space

• passes from air to water

• passes from water to air

• two of the above

Multiple Choice

Three different objects are shown in the pictures below. Which of the following transmits all colors of light?

Multiple Choice

Three different objects are shown in the pictures below. Which of the following absorbs all colors of light?

Multiple Choice

Light from the Sun transfers solar energy to the Earth system. Sunlight travels to Earth as _______ waves.

• electromagnetic

• seismic

• sound

• water

Multiple Choice

Which of the images best describes the absorption of light?