# MR. Fineman Physics Honors - Verona Public Schools

Todays Topic: Transverse/Longitudinal Waves Learning Goal: SWBAT quantify the differences between transverse and longitudinal waves and identify their uses. A sound wave of 250 Hz travels in 31 C air. What is the wavelength of this wave?

Another sound wave of 5,265 Hz travels 31 C in air. What is the wavelength of this wave? What do you notice about the wavelength as Homework Due Wednesday, 6/3: Complete the Wave Speed Worksheet

One Day Late: Pendulum Lab Simple Harmonic Motion Worksheet Types of Waves With this big slinky and two volunteers, lets go into the hallway to demonstrate two different types of waves.

What is similar between these two waves? What is different between these two waves? Wave Types What we just saw are an example of the

two different types of waves that exist: Transverse Waves and Longitudinal Waves. Whenever the motion of the medium is at right angles to the direction in which a wave travels, the wave is a transverse wave. Motion of Medium

Wave direction Transverse Waves One of the types of waves we saw with the slinky was a Transverse Wave. Which wave was the transverse wave? How do you know?

Here are some other examples of transverse waves. Transverse Waves Guitar Strings (Slow Motion Video) Snare Drums and Cymbals (Video) All electromagnetic waves (light,

infrared, UV, Gamma, etc.) Longitudinal Waves Not all waves are transverse waves. As seen in the slinky, sometimes the particles of the medium travel in the same direction as the wave. When the particles oscillate parallel to or

along the direction of the wave (rather than right angles to it) the wave is a longitudinal wave. Motion of Medium Wave direction Longitudinal Waves Sound waves are longitudinal waves.

Longitudinal Waves This air cannon is another example. Shockwaves are also examples of longitudinal waves Conceptual Check Where can you find Transverse Waves

in music? Where can you find Longitudinal Waves in music? Conceptual Check What types of waves do

you see at the beach or in a puddle? Are these transverse or longitudinal waves?

Lets focus on one dot a time Conceptual Check They are technically BOTH longitudinal and transverse. These are called surface waves.

Has Longitudinal Properties: And Transverse Properties: Add them together! (Up and down, and side-to-side motion) More Examples

A bunch of people are standing in line outside of GameStop to get their copy of Halo 5. A jerk in the back of the line pushes the kid in front of him, who pushes the kid in front of him, etc What type of wave is this? pulse direction

More Examples A crowd at a Rutgers Football Game are pretty excited at how the game is going. To show their excitement, they begin to do the wave. What type of wave this?

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