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I will know the three different types of mechanical waves. I will know the relationships among speed, wavelength, and frequency. I will be able to identify.

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Presentation on theme: "I will know the three different types of mechanical waves. I will know the relationships among speed, wavelength, and frequency. I will be able to identify."— Presentation transcript:

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2 I will know the three different types of mechanical waves. I will know the relationships among speed, wavelength, and frequency. I will be able to identify and name the different parts of a wave structure. I will be able to solve story problems for the wave equation.

3 In a wave pool, the waves carry energy across the pool. You can see the effects of a wave's energy when the wave lifts people in the water. Fun Fact:

4 A mechanical wave is a disturbance in matter that carries energy from one place to another. The material through which a wave travels is called a medium.

5 Solids, liquids, and gases all can act as mediums.

6 A vibration is a repeating back-and-forth motion.

7 The speed of a wave can change if it enters a new medium.

8 What causes mechanical waves? A mechanical wave is created when a source of energy causes a vibration to travel through a medium.

9 Three main types of mechanical waves: -- transverse waves -- longitudinal waves -- surface waves

10 1. A transverse wave causes the medium to vibrate in a direction perpendicular to the direction in which the wave travels. Crest Direction of wave Trough Direction of vibration

11 E XAMPLE OF TRANSVERSE WAVES ! http://www.kettering.edu/~drussell/Demos/waves/wavemotion.html

12 The wave carries energy from left to right, in a direction perpendicular to the up-and-down motion of the rope. Transverse Waves

13 PARTS OF A WAVE The highest point of the wave is the crest. The lowest point of the wave is the trough.

14 Amplitude The amplitude of a wave is the maximum displacement of the medium from its rest position.

15 The more energy a wave has, the greater is its amplitude. Rest position High amplitude Low amplitude

16 Wavelength can be measured from any point on a wave to the same point on the next cycle of the wave. Long wavelengthShort wavelength Rest position

17 2. A longitudinal wave is a wave in which the vibration of the medium is parallel to the direction the wave travels. Direction of wave Direction of vibration

18 A N EXAMPLE OF A LONGITUDINAL WAVE IS A SLINKY

19 P USH AT ONE END AND..

20 SUMMARY

21 A surface wave is a wave that travels along a surface separating two media. Example: Ocean waves

22 Turn to a partner #1 1. How does a mechanical wave carry energy from one place to another? A. vibration of a medium B. physical transfer of matter C. phase changes of a medium D. interaction of electromagnetic fields

23 Turn to a partner #1 -- answer 1. How does a mechanical wave carry energy from one place to another? A. vibration of a medium B. physical transfer of matter C. phase changes of a medium D. interaction of electromagnetic fields

24 Turn to a different partner #2 2. Name the wave in which the vibration of the medium is parallel to the direction the wave travels. A. longitudinal wave B. sound wave C. surface wave D. transverse wave

25 Turn to a different partner #2 2. Name the wave in which the vibration of the medium is parallel to the direction the wave travels. A. longitudinal wave B. sound wave C. surface wave D. transverse wave

26 Turn to a partner #3 3. Which example describes a transverse wave? A. sound wave traveling through air B. ocean wave far from the shore C. ocean wave as it approaches the shore D. light wave traveling through space

27 Turn to a partner #3 3. Which example describes a transverse wave? A. sound wave traveling through air B. ocean wave far from the shore C. ocean wave as it approaches the shore D. light wave traveling through space

28 S MALL GROUP : Discuss a sport where the athlete would need to understand the properties of waves.

29 ONE EXAMPLE: A surfer needs to understand the properties of waves.


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