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Wave InteractionsOr...What happens when a wave runs into stuff?
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Reflection
When a wave strikes an object and bounces back.
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How Does Reflection Look?
Angle of Incidence = Angle of Reflection
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Reflection Example:
Echos - Reflected Sound Waves
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Reflection Example:
Mirrors - Reflected Light Rays
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Refraction
When a wave travels from one medium to another and bends.
Example:
When light goes from air to water it changes speed and bends. Refraction makes the straw look disconnected in the glass.
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Refraction Example:
Light through a magnifying glass
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Refraction Example:Refraction is why objects in water appear closer than they really are!
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Diffraction
When a wave bends because it passes a barrier or travels through a hole or slit.
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Diffraction Example:
Light through Diffraction Glasses
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Interference
When two or more waves run into each other, overlap, and combine.
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Constructive Interference
When two or more waves combine to form a wave with a bigger amplitude.
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Destructive Interference
When two or more waves combine to form a wave with a smaller amplitude.
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Standing Wave
Standing waves are formed by wave interference, and appear to stand still.
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Parts of a Standing WaveNode: Part of standing wave where the amplitude is zero.
Antinode: Part of standing wave where amplitude is greatest.
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Resonance
When an object vibrates, and a nearby object starts vibrating.