Waves and Sound Vocab Flashcards
Waves are…
any disturbance that transfers energy through matter or space
A medium is…
a material through which waves can travel.
Waves that need a medium to travel are called
mechanical waves.
Transverse waves move…
up and down.
Points on a transverse wave are called
crests (the highest point) trough (the lowest point)
Longitudinal waves
move side to side and go back a back and forth motion
Points on a longitudinal waves are called
compressions and rarefractions
The relationship between frequency and wavelength are…
more frequency equals a decrease in wavelength
The relationship between frequency and energy are…
more frequency = more energy (tighter wave means more energy and more frequency)
The relationship between wavelength and energy is…
Shorter wavelength equals higher energy.
Electromagnetic waves…
do not need a medium to transfer energy.
Types of electromagnetic waves are…
RVMUXIWG
Radio Waves, Visible Light, Microwaves, Ultra violet light, X-rays, Infered Waves and Gamma rays.
The wavelength is the distance between
crest to crest or trough to trough
The weakest wave is…
a radio wave
The strongest waves are…
gamma waves
The distance between the peak of a wave and the midpoint is considered the…
amplitude
The number of cycles that pass in a certain time period considered the
frequency
The wave period is the…
time it takes for a certain number of cycles to pass.
Reflection is when…
a wave bounces back after striking a barrier.
Refraction is the…
bending of a wave as it changes directions
Diffraction is the…
bending of waves to pass a barrier or opening.
When two waves overlap it is called…
contsructive
Constructive waves increase…
amplitude
Destructive waves occur when…
two different crests in two different waves overlap
Destructive waves result in…
a decrease in amplitude
Standing waves occur when…
two waves collide and become uniform.
The frequency at which standing waves are produces is called
resonence
Sound is a
mechanical wave
High frequency=
high pitch
Low frequency =
low pitch
Frequency is measured in
hertz
intensity is measured in
decibels
The doppler effect is…
an increase (or decrease) in the frequency of sound, light, or other waves
Sound is a…
wave
Frequency determines…
pitch
Intensity determines…
loudness
Sound has many…
uses
Sound waves…
vibrate particles
Sound waves cannot
travel through a vacuum
Sound waves are what type of wave?
longitudinal waves
Sound travels at different speeds describe the different speeds through which sound travels.
Sound travels the slowest through gases, faster through liquids and the fastest through solids.
A normal human can hear between —- and —– hertz
20-20,000
Intensity is measured in…
decibels
Music is a mixture of…
sound waves
The doppler effect is when…
an apparent upward shift in frequency occurs when the source is approaching (the closer you get, the louder the noise)
Sound is used in…
SONAR, ultra sound, echolocation, music and recording
The formula for the velocity of a wave is…
wavelength times frequency
The formula for the frequency of a wave is…
velocity/wavelength
The formula for the wavelength of a wave is…
velocity/frequency
P waves travel through…
liquids solids and gases
S waves travel through…
only solids
A surface wave is a wave that…
travels along or parallel to the earth’s surface.
The interference of waves occurs when…
two waves meet when traveling on the same medium.
Resonance is…
an object has a natural frequency receives a forced vibration at he same frequency
Seismographs are used to…
record the motion of the ground during an earthquake.
The two types of light are…
natural and artificial.
The moon and stars DON’T reflect light towards the sun they…
receive light from the sun and reflect the waves onto the earth at night.
Sound waves cause the air to…
compress and expand
Light travels in…
a straight line.
Light travels faster than…
sound
We see objects because they…
reflect into our eyes
Louminous objects…
produce light
Non louminous objects…
reflect light
Light gets reflected at the same…
angle it hits.
Shiny smooth surfaces have a —– reflection (think about a mirror)
clear
Rough surfaces have a —– reflection
diffused (light scatters in different directions
Rarefraction occurs when…
waves speed up or slow down. EX: light waves are disturbed by water causing the waves to bend and appear odd. (bending of a wave)
The color reflected from an object depends on the objects…
color
black absorbs…
all light waves (all visible color)
How is the triangle organized for the formulas for frequency, velocity and wavelength?
velocity on the top frequency on the left and wavelength on the right.
