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