Waves Flashcards
What does a wave carry?
A wave carries energy.
What is the movement of a wave all the way through a medium without any reflection, refraction, or diffraction taking place?
Transmission.
What is reflection?
Reflection is when the wave changes directions as it bounces off of a boundary.
___________ involves a change in direction of waves as they pass through an opening or around a barrier.
Diffraction.
What is refraction?
Refraction is the change in the speed and direction of waves that occurs when waves travel from one medium to another.
A _______ is one complete oscillation of a wave.
Cycle.
What is the time it takes for one cycle called?
The period is the time it takes for one cycle to occur.
What is frequency?
Frequency is the number of cycles that pass through a point in one second.
In transverse waves the particles of the medium travel in what direction compared to the direction of the wave?
The particles move perpendicular to the direction of the wave.
In __________ waves the particles of the medium travel parallel to the direction of the wave.
Longitudinal.
What is the maximum height of a crest called?
It is called the amplitude.
What is a wavelength?
A wavelength is the horizontal distance of one cycle of a wave.
Characteristics of the partially transmitted pulse from less dense medium to more dense medium:
- It will be upright
- It will have a slower speed, shorter wavelength, and smaller amplitude than the incident pulse
- Frequency will stay the same
Characteristics of the partially reflected pulse from a less dense medium to a more dense medium:
- It will be inverted
- Has the same speed and wavelength as the incident pulse
- Will have a smaller amplitude than the incident pulse
- Frequency stays the same
What is a mechanical wave?
A mechanical wave is a wave that transports kinetic energy through a physical medium.
What is the point that connects two different media?
The boundary connects two media.
What is the quietest part of a sound wave?
The quietest part is the node, and the loudest is at the antinode.
How is a sound wave like a transverse wave?
The distance/time graph of one particle in a longitudinal wave creates a transverse wave. Also a pressure graph of a sound wave creates a transverse wave.
What physical part of a wave would have to change in order to increase the pitch is the sound?
A) amplitude
B) frequency
C) intensity
B) frequency
In order to decrease the intensity of a sound what physical characteristic would have to change?
The amplitude would have to change.
What kind of sound is above the human audible range?
Ultrasonic sound is above human audible range, whereas infrasonic sound is below it.
A closed tube will always have a(n) ______ at the closed end.
A) node
B) antinode
A) node
An open end air column always has antinodes at both ends.
True of False?
True.
After being reflected from a fixed end will the pulse be…
A) inverted
B) upright
A) inverted
A reflection from a free end will remain upright.
