© 2004 Plano ISD, Plano, TX During every waking and sleeping moment of our lives, we are bombarded...


During every waking and sleeping moment of our lives, we are

bombarded with

During every waking and sleeping moment of our lives, we are

bombarded with

of energy.of energy.


Most energy waves

collide with us or pass

right through us without any

notice on our part.

Most energy waves

collide with us or pass

right through us without any

notice on our part.

Waves carry energy, but not matter; however,

Waves carry energy, but not matter; however, matter can

be used to transfer energy.

matter can be used to

transfer energy.


The matter used to transport the

wave is a medium.

The matter used to transport the

wave is a medium.

What is the

medium?

What is the

medium?

Waves that use matter to transfer

energy are mechanical wavesmechanical waves.

Waves that use matter to transfer

energy are mechanical wavesmechanical waves.


What is the

medium?

What is the

medium?


In the 15th century, Leonardo da Vinci

observed that while waves move, the medium (water)

does not, “like the waves made in a

field of grain by the wind, where we see the waves running

across the field while the grain

remains in place.”

In the 15th century, Leonardo da Vinci

observed that while waves move, the medium (water)

does not, “like the waves made in a

field of grain by the wind, where we see the waves running

across the field while the grain

remains in place.”


Water,sound, and earthquake waves are

examples of mechanical waves.

Water,sound, and earthquake waves are

examples of mechanical waves.


Mechanical waves can be classified according to the

direction of the motion of matter in relation to the direction of

wave motion.

Mechanical waves can be classified according to the

direction of the motion of matter in relation to the direction of

wave motion.


Mechanical waves in which matter moves up and down or back and forth at right angles compared to the direction of

wave movement are transverse waves.

Mechanical waves in which matter moves up and down or back and forth at right angles compared to the direction of

wave movement are transverse waves.

Click here to see transverse

waves in action!


Mechanical waves in which medium matter moves forward

and backward in the same direction the wave travels are longitudinal or compressional

waves.

Mechanical waves in which medium matter moves forward

and backward in the same direction the wave travels are longitudinal or compressional

waves.Click here to see compressional

waves in action!


Amplitude:Distance betweencrest and troughWavelength: Distance between 2 crests OR 2 troughsFrequency: waves per second (measured in Hertz/Hz)Speed: distance per second

Properties of Waves


Properties of Waves


Waves that do not require matter to

transfer energy are electromagnetic electromagnetic

waveswaves.

Waves that do not require matter to

transfer energy are electromagnetic electromagnetic

waveswaves.

Electromagnetic waves can travel

through a medium, but they can also travel in space or

through a vacuum.

Electromagnetic waves can travel

through a medium, but they can also travel in space or

through a vacuum.


Radio waves, X-rays, microwaves, and visible light

waves are examples of

electromagnetic waves.

Radio waves, X-rays, microwaves, and visible light

waves are examples of

electromagnetic waves. They can all travel

through empty space and they all travel at the same speed. This speed

is sometimes called The

Speed of Light.

They can all travel through empty

space and they all travel at the same speed. This speed

is sometimes called The

Speed of Light.


Electromagnetic waves are

produced by charged particles

that move. Energy from EM waves is

called EM RADIATION.

Electromagnetic waves are

produced by charged particles

that move. Energy from EM waves is

called EM RADIATION.

Even though EM waves have the

same speed, they have different

wavelengths and frequencies. (look

at the EM spectrum)

Even though EM waves have the

same speed, they have different

wavelengths and frequencies. (look

at the EM spectrum)


Review the information on waves by filling in the

concept map.

Review the information on waves by filling in the

concept map.

Waves

Waves

do not move or carryenergy

include examples such as

transfer energy through

matter called a

________

includes

transfer or carry

mechanical waves

matter

can be classified into two categories

electromagnetic waves

medium

solids, liquid

s, gasse

s

longitudinal or

compression waves

transverse waves

matter forward

and backward

in the same

direction of wave

movement

matter up and down or back

and forth at right angles

compared to the

direction of wave

movement

move move

to transfer

do not require

include examples such as

matter

energy

are further classified into

are a special type of


Bibliography

Bibliography

Macaulay, David. (1988). How things work. Boston: Houghton Mifflin Company. pp. 186 Macaulay, David. (1988). How things work. Boston: Houghton Mifflin Company. pp. 186

Resnick, Halliday, Krane. (1992). Physics. 4th Edition, Volume 1. New York: John Wiley & Sons, Inc. pp. 417-418.

Resnick, Halliday, Krane. (1992). Physics. 4th Edition, Volume 1. New York: John Wiley & Sons, Inc. pp. 417-418.

“What are waves?” (2002). Texas Science. New York: Glenco McGraw-Hill,pp. 186-187. “What are waves?” (2002). Texas Science. New York: Glenco McGraw-Hill,pp. 186-187.

© 2004 Plano ISD, Plano, TX During every waking and sleeping moment of our lives, we are bombarded...

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