Destructive Interference
What is a product that uses Destructive Interference?
Noise canceling headphones.
What is the lowest point of a wave called?
Trough.
True or false: We never use interference in our day to day life.
False
What type of instrument uses standing waves the most?
String Instruments.
Does Destructive Interference cancel out a wave or increase the amplitude?
It cancels out.
What does Constructive Interference do?
Makes a deeper or taller wave.
Name a way we use constructive interference in society.
Radio communication
True or false? Standing waves allow all frequencies.
False
Do the waves in destructive interference have to be the same (Mirrored) or completely different waves?
The same Mirrored.
When the waves align and combine together, does the sound become greater or less with constructive interference.
It increases.
How do noise Cancelling headphones work?
They send out a wave that cancels out incoming waves using destructive interference.
What type of surface does a standing wave need?
A reflective.
Instead of adding amplitude, destructive interference does what to waves?
It subtracts them and cancels out
What are the requirements to make Constructive Interference?
When waves are at the same place at the same time, the amplitudes of the waves add together.
How does anti reflective cameras lenses work?
When a light wave reflects against the lens it sends off another wave that cancels the reflective wave using destructive interference.
What is the highest point of a wave and what is the point waves intersect?
Antinode and Node
When does Destructive Interference occur?
Destructive interference occurs when waves offset and this makes the sound quieter or stops the sound altogether.
When does Constructive Interference occur?
Constructive Interference occurs when waves align.
Noise Cancelling Headphones (Destructive) Anti reflective cameras (Destructive) Medical Imaging (Both) Radio communications (Constructive)
How are standing waves created?
Standing waves are created by 2 waves with the same frequency, same wavelength. Same amplitude, and 2 waves traveling in opposite directions.