Wave Properties Students will be able to Explain wave structure Contrast transverse and longitudinal waves Describe properties of a wave.

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Presentation transcript:

Wave Properties Students will be able to Explain wave structure Contrast transverse and longitudinal waves Describe properties of a wave

What are Waves? Wave A disturbance that transfers energy from one place to another 5

What Carries Waves? Medium The material through which a wave travels Examples: Liquids, Air, Solids… Mechanical Waves Waves that need a medium Examples: Water and Sound Electromagnetic Waves Waves that do not need a medium Light 6

Transfer of Energy Mechanical waves travel in a medium but do not move the medium to a different place 6

What Causes Waves A pulse or vibration causes a medium to move energy 7

Types of waves Transverse waves (across) High point – Crest Low point – Trough 8

Types of waves Longitudinal Waves Move medium in to direction of motion Compression = Come together Rarefactions = Spread out 9

Representing Waves 10

Three Properties of Waves Waves can have different amounts of energy 1. Waves can be tall or short Amplitude 2. Waves can occur often or rarely Frequency 3. Waves can move fast or slow Speed 11

Amplitude Maximum distance that the particles of the medium carrying the wave move away from the rest position 12

Wavelength The distance between two corresponding parts of a wave 13

Frequency Number of waves that pass a given point in a certain period of time Hertz # of waves / second 13

Speed Lightning Light Sound Rumble Why? Light travels faster so it reaches you first Sound travels slower so comes later 14

Speed Formula Speed = Wavelength x Frequency Others can be used Frequency = Speed / Wavelength Wavelength = Speed / Frequency 14

Math 15

Homework Draw and label a transverse and a longitudinal wave.