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41 Cards in this Set

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Sonograms are possible because some ultrasound waves are _____________ when they pass from one type of material to another.
reflected
In a vacuum, all light travels at the same speed, which is:_____________
3 10*8 m/s
Soundwaves with frequencies higher than 20,000 Hz are referred to as:_____________ waves
ultrasonic
A transparent object that can separate white light into diffferent colors is called a _________
prism
A lens that bends light outward is called a _________ lens
diverging
The matter through which a wave travels is called the __________
medium
A lens that bends light inward is called a ______ lens
converging
Reflection of light into random directions is called:____________ reflection
difussion
The bending of waves as they pass from one medium to another is called
I DO NOT KNOW THE ANSWER BECAUSE SHE MARKED IT WRONG ON YOURS AND DID NOT WRITE THE CORRECT ANSWER
In the particle model of light, individual packets of light are called ________
photons
The twom onst common models of light describe it as a wave or a stream of ________
particles
A wave that causes the particles of the medium to vibrate paralell to the direction the wave travels is called a ____________ wave
longitudional
The image that you see in a mirror that results from the apparent path of light rays is called a _______________ image
virtual
When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the:___________________________
hammer, anvil, and stirrup
The structure within the cochlea containing hair cells that vibrate at different natural frequencies is the:________________
basilar membrane
Light waves:_________
Are electromagnetic waves
How loud a sound is depends on:___________________
the amplitude of the waves
Which type of electromagnetic wave has the highest frequency? ______________
gamma rays
The intensity of a sound describes:______________
its loudness at a particular distance
The effect in which white light seperates into different colors is called:________
dispersion
An orange looks orange because it:________________
reflects orange light and obsorbs other colors
A sonar system measures distance by determining the:______________
time it takes for sound waves to bounce off a surface
when light rays reflect off a rough surface, they:_______________
scatter in many different directions
The particle model of light explains how light can:______________
travel through an empty space without a medium
White light breaks up into different colors when it passes through a prism because of:______________
differences in wave speed
The difference between visible light and X rays is that:________________
the frequency of X rays is greater
The frequency of sound waves is determined by the:_____________
source of the wave
An ultrasound system can produce images of body structures because sound waves:_____________________
travel at different speeds through materials of different densities
A __________ is a good mathematical model for representing transverse waves
sine curve
Sound travels fastest in:___________
Sea water
Light waves are
transverse
Short-range radar works by sending a signal out from a control tower that is:_________________
reflected off a plane back to the control tower
The rate at which light energy flows through a given area of space is referred to as its:__________
intensity
The law of reflection states that when light rays reflect off a surface the angle of incidence:____________
equals the angle of refraction
The medium seismic waves travel through is:_________
rocks and other materials inside Earth
Sound waves are:________
longitudinal waves
Which type of electromagnetic wave has the greatest wavelegnth:___________
radio waves
The pitch of a sound is most clearly related to the:______________
frequency of vibrations
A virtual image caused by reflection of light in the atmosphere is called:_________
a mirage
The frequency of a sound wave determines:____________
the pitch of the sound
Sound waves:__________
require a medium