Wave properties
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

Wave Properties PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on
  • Presentation posted in: General

Wave Properties. Learning Goals: Define wavelength, frequency, period, and amplitude. Describe the relationship between frequency and wavelength. Explain how a wave’s energy and amplitude are related. Calculate wave speed. Parts of a Wave. Crest: high point of the wave form

Download Presentation

Wave Properties

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Wave properties

Wave Properties

Learning Goals:

  • Define wavelength, frequency, period, and amplitude.

  • Describe the relationship between frequency and wavelength.

  • Explain how a wave’s energy and amplitude are related.

  • Calculate wave speed.


Parts of a wave

Parts of a Wave

  • Crest:high point of the wave form

  • Trough: low point of the wave form

  • Compression: more dense region of a longitudinal wave

  • Rarefaction: less dense region of a longitudinal wave

crest

Rest position

trough


Wave properties1

Wave Properties

Wavelength:

Defined - distance between one point on a wave and the nearest point just like it Distance from…

1) Crest to crest2) Trough to trough3) Start of one compression to the next4) Start of one rarefaction to the next

wavelength

wavelength

wavelength

wavelength

Rest position


Wave properties2

Wave Properties

Frequency:

  • Defined - the number of wavelengths (or number of vibrations) that pass a fixed point each second

  • Frequency is expressed in hertz (Hz).

  • A frequency of 1 Hz means that one wavelength (or one vibration) passes by in one second. Two vibrations per second is 2 Hz.

  • In SI units, 1 Hz is the same as 1/s.


Wave properties3

Wave Properties

Period:

  • Defined -the amount of time it takes one wavelength to pass a point, measured in seconds

  • As the frequency of a wave increases, the period decreases.


Wave properties4

Wave Properties

Period (continued):

  • Consider the following:

    A wave has a frequency of 2 Hz. This means that two wavelengths pass a point in one second. How much time does it take for one wavelength to pass a point?

    Answer: 1/2 or 0.5 second, so the period of this wave is 0.5 s.


Wave properties5

Wave Properties

Period (continued):

  • What about a wave with a frequency of 3 Hz. This means that three wavelengths pass a point in one second. How much time does it take for one wavelength to pass a point?

    Answer: 1/3 or 0.33 second, so the period of this wave is 0.33 s.


Wave properties6

Wave Properties

Wavelength and Frequency:

  • The relationship is inversely proportional: when one increases, the other decreases.


Wave properties7

Wave Properties

Wave Speed:

  • Depends on… the medium it is traveling through. Sound waves usually travel faster in liquids and solids than they do in gases. However, light waves travel more slowly in liquids and solids than they do in gases or in empty space. Also, sound waves usually travel faster in material when the temperature of the material is increased.


Wave properties

Wave Properties

Wave Speed (continued):

  • Calculated by multiplying its frequency times its wavelength

  • speed (in m/s) = frequency (in Hz) x wavelength (in m)

    v = ƒλ


Wave properties8

Wave Properties

Amplitude and Energy:

  • Amplitude is related to the energy transferred by a wave.

  • The greater the wave’s amplitude, the more energy the wave transfers.


Wave properties9

Wave Properties

crest

amplitude

amplitude

trough

Measuring Amplitude in a Transverse Wave


  • Login