Studied by 13 peopledefinition of mechanical wave
a vibratiation traveling through a medium
what is the pattern of travel for a longtidunial wave?
it travels parallel to the surface
what is the pattern of travel for a transverse wave?
travels perpendicular to the surface
what is the source of a sound wave?
a vibration of matter
which part of the sound wave affects the intensity(volume)of the sound
amplitude
Which of the following affects the pitch (high or low) of a sound?
frequency
what is the relationship between wavelength and frequency?
The higher or lower the frequency, the shorter or longer the wavelength is. Higher freqeuncy →shorter wavelength, lower frequency → longer wavelength
what is it called when light passes through matter
transmission
what type of matter transmits light without scattering it?
transparent
which color has the lowest frequency?
red
which color has the shortest wavelength?
violet
what determines the energy of a light wave?
frequency
what is the most common source of an electromagnetic wave?
the sun
Which type of electromagnetic wave can penetrate the skin, but not through teeth or bone?
X ray
which of the following can cause cancer and is also part of a treatment for cancer?
gamma rays- also they are the most dangerous and highest frequency
Which of the following uses high energy (high amplitude) ultrasound waves?
therepeutic ultrasound
how are we able to see a rainbow?
We are able to see rainbow because of the light from the sun hitting the raindroplets, which then refract and make a color for the human eye to see, which is a prism of different colors because of the different raindrops dropping at different times.
How is the vibration of the source related to a wave’s frequency?
the wave's frequency is the same as the frequency of the vibrating source producing the wave.
How is wavelength related to frequency for waves moving at a constant speed?
as frequency increases, the wavelength must decrease
How is the energy of a wave related to its amplitude?
the higher the amplitude is, the higher the energy is.
If the amplitude of a sound wave changes, how will the sound be affected?
the sound is recognized as louder if the amplitude increases, and softer if the amplitude decreases.
If the frequency of a sound wave changes, how will the sound be affected?
the higher the frequency waves, the higher pitch sound we hear.
How does ultrasound make use of sound waves with the same or similar frequencies, but different energy levels?
the higher energy is being used to destroy kidney stones and things like that, while the lower energy is used for babies ultrasound so it won't harm the baby.
How do sound waves produce a picture on an ultrasound?
the sound waves are returned to the transducer by boundaries between tissues in the path of the beam.
Do you know anyone who has gone through therapeutic ultrasound treatments? What else do you think these treatments could be used for?
I don't think I know anyone that has. I think they could be used for like bacteria in your body?
how does light interact with matter?
absorption, reflection, transmission
what is polarization?
polarizing filters blocking out light waves moving in opposite directions
types of matter based on it’s interaction with light
transparent, translucent, opaque
what are the primary colors? and what are the secondary colors?
red, green, blue
cyan, magenta, yellow
what does sound travel fastest/best through?
solids rather than liquids or gasses
what does ultrasounds use?
wave frequencies higher than the human ear can hear
electromagnetic waves are what type of wave?
transverse
what part of the yee controls the size of the pupil?
the iris
what do rods and cones sense?
rods- black and white
cones- color
what are the differences between longitudinal and transverse waves?
longitudinal-travel parallel to the surface, can’t be polarized, mechanical wave
transverse- travel perpendicular to the surface, can be polarized, non-mechanical
what is speed, wavelength, and frequency measured with?
speed- mps
wavelength- meters
frequency- kurtz
what is the electromagnetic spectrum?
the range of all types of electromagnetic radiation
what is an electric wave?
a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium
what is the higher energy ultrasound?
therepeutic
what is the lower energy ultrasound?
diagnostic
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