Changes in Waves

Essential Question: How do changes in one part of a wave affect other parts of a wave? (d. Explain the causes

of waves)

Use the PowerPoint to fill in the Changes in Wave Properties

Notes

Changes in Wave Properties Name_________________________ Date______Period___

Larger Amplitude =

Frequency is __________________________________________________________________ Wavelength and Frequency are inversely related. If a wave is traveling at the same speed, as the ______________ of a wave ____________, its ________________ ______________. The same is true in reverse. As the ________________ of a wave ____________, its ______________ ________________.

Wavelength, Frequency, and Energy Shorter _______________ = _____________ Frequency = ___________ Energy ___________ Wavelength = Lower _______________ = Less _____________

Review: Parts of a Transverse Wave

The amplitude is the peak (greatest) value (either positive or negative) of a wave. The distance from the undisturbed level to the

trough or crest.

Larger amplitude = More Energy

Less EnergyTransferred

More EnergyTransferred

Review: Parts of a Wave

The wavelength is the distance…

between the crests or troughs of two consecutive

transverse waves

from compression to compression or

rarefaction to rarefaction in a compressional wave

Frequency is the number of wavelengths that pass a point in

a given amount of time.

Low Frequency

High Frequency

Wavelength and Frequency are inversely related.

If a wave is traveling at the same speed, as the frequency of a wave

increases, its wavelength decreases.

The same is true in reverse. As the wavelength of a wave increases, its frequency

decreases.

Low Frequency

High Frequency

Long Wavelength

ShortWavelength

Wavelength, Frequency,

and EnergyShorter Wavelength =

Higher Frequency = More Energy

Longer Wavelength = Lower Frequency = Less Energy

Please read:Procedure:

•Be sure the setting on side bar are as follows: Mass slider is at 1.00 kg, friction slider is none, Real time is checked, earth is checked, other tools is checked, photo gate is unchecked

•Move the length slider so the weight is hanging 2.5m down

•Pull the weight back 45 degrees from rest position and release the weight so that it will swing back and forth.

Procedures continued : Now go back to ikeepbookmarks use the link

5. Start the timer (make sure other tools is checked)6. Count the number of times it swings back and forth in 30 seconds and record (1 cycle or swing is over and back).7. Repeat steps 4 and 5 twice more for 3 trials.8. Hit reset, Repeat steps 3 – 6 but change the slider so the weight is hanging at 1.5 m and .5 m. 9. Calculate the frequency by dividing the average swings in 30 sec by 30sec (answer is in Hertz) (you can use the calculator on the computer)10. Calculate the speed of the wave by multiplying the wavelength (string length in meters) x frequency.

Use link #2

Go back to ikeepbookmarks use link

#2 Pendulum lab new