Question | Answer |
any disturbace that transmits energy through matter or empty space | wave |
does the material through which a wave travels move with the energy? | no |
what is the substance through which a wave travels? | medium |
do sound waves need a medium? | yes |
do eletrocmagentic waves need a medium? | no |
what are some examples of electromagentic waves? | visible light, microwaves, x rays |
what is the type of wave that moves in an up and down motion? | transverse waves |
highest point of a transverse wave? | crest |
lowest point of a transverse wave? | trough |
electromagnetic waves are --- waves | transverse |
what is the type of wave whose particles vibrate back and forth? | logitudinal |
places in a logitudinal wave where particles are crowded together | compression |
places in a logitudinal wave where particles are dispersed | rarefaction |
sound waves are --- waves | logitudinal |
surface waves are made up of --- and --- waves. | logitudinal and transverse |
the maximum difference that the particles of a wave's medium vibrate from their rest position | amplitude |
what is the rest position in a wave? | the point where the particles of a medium stay with no disturbances |
larger amplitude = --- (more or less) energy | more |
wavelength | the distance between any two points next to each other on a wave |
longer wavelength = --- (more or less) energy | less |
the number of waves produced in a given amount of time | frequency |
what is frequency measured in? | Hertz (Hz) |
higher frequency = (more or less) energy | more |
the speed at which a wave travels | wave speed |
what is the formula for wave speed? | wave speed = wavelength x frequency |
happens when a wave bounces back after hitting a barrier | reflection |
can all waves bee reflected? | yes |
what is a reflected sound wave called? | echo |
the bending of a wave as the wave passes from one medium to another at an angle | refraction |
when a wave enters a new medium, do the wavelength and wave speed often change? | yes |
the bending of waves around a barrier or through an opening | diffraction |
the result of two or more waves overlapping | interference |
construcive interference? | when waves combine |
destructive interference? | when waves cancel each other out |
a pattern of vibration that stimulates a wave that is standing still | standing wave |
the frequencies at which standing waves form | resonant frequencies |