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Waves Waves are oscillations that carry energy and information from one place to another. Examples of waves: light, sound, electricity in a wire, cell.

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Presentation on theme: "Waves Waves are oscillations that carry energy and information from one place to another. Examples of waves: light, sound, electricity in a wire, cell."— Presentation transcript:

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2 Waves Waves are oscillations that carry energy and information from one place to another. Examples of waves: light, sound, electricity in a wire, cell phone transmissions, ripple in a pond Two types of waves: transverse and longitudinal

3 Transverse Waves Transverse wave: has its oscillations perpendicular to the direction of the wave. The wave moves left to right and the oscillation moves up and down Ocean waves are transverse waves transverse

4 Longitudinal Wave Longitudinal wave: has oscillations in the same direction the wave moves. Sound is a longitudinal wave longitudinal

5 Frequency, amplitude, and wavelength parts to a wave parts to a wave Frequency of a wave is a measure of how often it goes up and down and is measured in hertz (Hz) Amplitude of a wave is the height of the wave above the level surface Wavelength is the length of one complete cycle of a wave. Typically measured from crest to crest or trough to trough Pitch

6 Speed Speed describes how fast the wave moves Speed is frequency (f) times wavelength  Speed (m/sec) Frequency (hz) Wavelength (m)

7 What happens when a wave hits something? Reflection: bounce off and goes in a new direction. Refraction: bends as it crosses the edge Ripple Tank

8 Diffraction: bends as it goes around a corner or through an opening Absorption: amplitude gets smaller and smaller as it passes through the material


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