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# Waves

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 Physics: Standard 3 - Waves Checks for Understanding 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | 3.10 | 3.11 | 3.12 | 3.13 Science Curriculum Standards 3231 - Physics Internet Resources Investigate simple harmonic motion. 3.1 Investigate and analyze wavelength, frequency, and amplitude of longitudinal and transverse waves. 3.2 Beat Frequencies in Sound - A beat frequency or beat wave is a sound of fluctuating volume caused when you add two sound waves of slightly different frequencies. Tacoma Narrows Bridge Failure - photos illustrating this classic case of wave interaction you might also want to see a short (10 second) clip of the failure. Resonance applet with instructions in the form of a dialog Experiments on Wave Interference Classic two slit interference change the slit separation to determine the interference pattern Diffraction of Light by a Single Slit - an applet to investigate diffraction Explore standing waves created by waves moving in opposite direction (no reflection) with this java applet Standing Longitudinal Waves - This Java applet demonstrates the harmonics of the air in a tube as an example of standing longitudinal waves. Standing Wave - Explanation by Superposition with the Reflected Wave Create standing waves (with reflection at a boundary) with this excellent java applet. Change parameters or step the animation forward slowly while viewing the component waves to investigate interference. To isolate wave reflection, you might want to view the reflection of a single pulse. Hearing Subtraction - (an activity on frequency and beats) This site allows students to hear beat frequency caused by two sounds. Interference of Light at a Double Slit - an applet to investigate interference Interference of two Circular or Spherical Waves - This Java applet shows the interference of two circular respectively spherical waves (e.g. of water or sound waves). Reflection and Refraction of Light Waves [Huygens' Principle] - This applet is a tutorial which explains the reflection and the refraction of waves by the principle of Huygens. Refraction of Light - The applet shows the reflected and the refracted ray and calculates the corresponding angles. Students can change the incident angle and the media. Describe a wave interaction as reflection, refraction, diffraction, or interference. 3.3 Explore Hooke’s Law. 3.4 Hooke's Law - This java applet allows students to change variables and investigate Hooke's law. Investigate reflection, refraction, diffraction, and interference of sound waves. 3.5 Beat Frequencies in Sound - A beat frequency or beat wave is a sound of fluctuating volume caused when you add two sound waves of slightly different frequencies. Tacoma Narrows Bridge Failure - photos illustrating this classic case of wave interaction you might also want to see a short (10 second) clip of the failure. Resonance applet with instructions in the form of a dialog Experiments on Wave Interference Classic two slit interference change the slit separation to determine the interference pattern Diffraction of Light by a Single Slit - an applet to investigate diffraction Explore standing waves created by waves moving in opposite direction (no reflection) with this java applet Standing Longitudinal Waves - This Java applet demonstrates the harmonics of the air in a tube as an example of standing longitudinal waves. Standing Wave - Explanation by Superposition with the Reflected Wave Create standing waves (with reflection at a boundary) with this excellent java applet. Change parameters or step the animation forward slowly while viewing the component waves to investigate interference. To isolate wave reflection, you might want to view the reflection of a single pulse. Hearing Subtraction - (an activity on frequency and beats) This site allows students to hear beat frequency caused by two sounds. Interference of Light at a Double Slit - an applet to investigate interference Interference of two Circular or Spherical Waves - This Java applet shows the interference of two circular respectively spherical waves (e.g. of water or sound waves). Reflection and Refraction of Light Waves [Huygens' Principle] - This applet is a tutorial which explains the reflection and the refraction of waves by the principle of Huygens. Refraction of Light - The applet shows the reflected and the refracted ray and calculates the corresponding angles. Students can change the incident angle and the media. Compare mechanical and electromagnetic waves. 3.6 Electromagnetic Spectrum - In this applet, you can click on the wavelength/frequency scale and change the wavelength and frequency by dragging the mouse or by using the arrow keys on the keyboard. Holding the shift key down while pressing the left or right arrow keys changes the wavelength by a factor of 10. Explain the Doppler Effect. 3.7 This police car applet might make an interesting introduction to the subject of the Doppler effect Behavior of Waves : The Doppler Effect Java applet - Click anywhere within the gray area and drag the mouse. An arrow representing the source velocity vector will appear. Doppler applet which allows users to change wave speed, source speed, and wave length by clicking and dragging A nice Doppler applet from Fear of Physics Doppler Physlet - an applet (by another name) Doppler Effect Example - java applet The Doppler Effect and Sonic Booms An amazing picture of a sonic boom from Astronomy Picture of the Day Determine the speed of sound experimentally and describe the effects various materials and temperatures on sound transmission. 3.8 Measure spring constants. 3.9 Hooke's Law - This java applet allows students to change variables and investigate Hooke's law. Solve problems related to wave length, frequency and speed [wave velocity: v =f ?]. 3.10 Determine the speed of sound experimentally using various materials and temperatures [sound velocity: vs= f ?; Sound velocity (using air temperature): vs= 331.5m/s + (0.56 m/s oC) (T)]. 3.11 Describe simple harmonic motion. 3.12 Beat Frequencies in Sound - A beat frequency or beat wave is a sound of fluctuating volume caused when you add two sound waves of slightly different frequencies. Tacoma Narrows Bridge Failure - photos illustrating this classic case of wave interaction you might also want to see a short (10 second) clip of the failure. Resonance applet with instructions in the form of a dialog Explore standing waves created by waves moving in opposite direction (no reflection) with this java applet Standing Longitudinal Waves - This Java applet demonstrates the harmonics of the air in a tube as an example of standing longitudinal waves. Standing Wave - Explanation by Superposition with the Reflected Wave Create standing waves (with reflection at a boundary) with this excellent java applet. Change parameters or step the animation forward slowly while viewing the component waves to investigate interference. To isolate wave reflection, you might want to view the reflection of a single pulse. Hearing Subtraction - (an activity on frequency and beats) This site allows students to hear beat frequency caused by two sounds. Interferenc Compare the wave characteristics of natural auditory phenomena. 3.13 Beat Frequencies in Sound - A beat frequency or beat wave is a sound of fluctuating volume caused when you add two sound waves of slightly different frequencies. Decibel Levels - This Cool Math page contains a list of decibel levels of everything from guitars to jet engines! Decibels - from Hyperphysics, includes an interactive decibel calculation section Hearing Subtraction - an activity on beats and frequency Typical average decibel levels (dB) of some common sounds - scroll to the bottom Understanding Sound Intensity - a good decibel scale is included What is a decibel? - an extensive discussion of this logarithmic unit used to describe a ratio What is a decibel, and what is the loudest sound I can listen to before it hurts my ears? - from How Stuff Works

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