Wave & Pendulum Terms
The time for a complete to-and-fro swing of a pendulum.
Period
Name an example of a longitudinal wave.
Sound
The distance from crest to crest or trough to trough.
Wavelength
What is the period of a 1 m long pendulum on earth?
2 seconds
What is the velocity of a wave with a wavelength of 1 m and a frequency of 10 Hz?
10 m/s
The number of complete to-and-fro swings of a pendulum in one second.
Frequency
Name an example of a transverse wave.
Radio Wave, visible light, X-Ray, etc.
The highest point on the wave.
Crest
What is the period of a 2 m long pendulum on earth?
2.84 seconds
What is the frequency of a sound wave (v=340 m/s) that has a wavelength of 9 m?
37.8 Hz
The string of a guitar is plucked and it vibrates. Which type of wave was created?
Standing Wave
In a longitudinal wave, the particals of the medium vibrate _______________ to the direction in which the wave travels.
Parallel
The lowest part of the wave.
Trough
What is the period of a 1 m long pendulum on the moon (g=1.6)?
4.97 seconds
What is the wavelength of red light if it travels at 3 x 10^8 m/s with a frequency of 5 x 10 ^(14) Hz?
6 x 10^ (-7) m
In a transverse wave, the particles of the medium vibrate __________ to the direction which the wave travels.
Perpendicular
These two factors affect the period of a pendulum.
Length & Gravity.
The distance from the midpoint of the wave to the highest point of the wave.
Amplitude
What is the period of a 2 m long pendulum on Jupiter (g=25)?
1.26 seconds
While floating in a raft, you notice that 5 waves pass you every 10 seconds. You also notice that the waves are 2.0 m apart. What is the velocity of the waves?
1 m/s
The changing of pitch as a train drives by you is an example of _______________.
The Doppler Effect
This type of electromagnetic radiation has the shortest wavelength and can be the most damaging to biological organisms (cancer, etc.).
Gamma Rays
The point on a standing wave where no motion occurs.
Node
What is the length of a pendulum that takes 5 seconds to complete one to-and-fro motion while on earth?
6.2 m
An ocean wave has a frequency of 0.05 Hz and a wavelength of 10 meters. What is its speed (velocity)?
0.5 m/s