Chapter 15 - Making waves Flashcards
What does the speed of a pulse depend on?
Tension and mass
What region is the pulse in?
In the compression region of a wave
How does a longitudinal wave move?
It moves parallel with direction
How could a periodic wave be produced?
If you repeat a series of identical pulses at regular time intervals
What is a wave that’s in a sinusoidal form called?
A harmonic wave
How is an upward force acquired on a rope?
As the raised portion of a pulse approaches a given point on the rope, the tension in the rope acquires an upward component
How is the speed of the pulse depend on the tension and mass?
- The speed depends on the acceleration
- By Newton’s second law, this is proportional to the force and inversely proportional to the mass of the segment
- A larger tension produces a larger acceleration.
- The speed of the pulse will increase with the tension and decrease with the mass per unit length of the rope
What is interference?
When two or more waves combine
What is the principle of superposition?
When two or more waves combine, the resulting
disturbance or displacement is equal to the sum of the
individual disturbances
How are two waves moving in phase?
When they are moving the same way at the same time
How are two waves out of phase?
If one wave is moving upward when the other wave is moving downward
When do we have constructive interference?
When waves are in phase
When do we have destructive interference?
When waves are out of phase
How is the type of interference determined?
When two or more waves are traveling in the same direction, the difference in phase determines the type of interference
What is an antinode?
When two waves are in phase and produce a displacement double the single waves on their own when they are added
