Vibrations and waves
What is a wave?
A wiggle in both time and space
What is our sensation of of a sound's frequency called?
A pitch
What is the reflection of sound?
an echo
Where is wave interference easiest to observe
In water
Light
What does the term "Amplitude" refer to when discussing waves?
What type of wave is a sound wave?
A longitudinal wave
The angle of incident sound is equal to the angle of what?
reflected sound
Interference is a property of what wave types?
All
What is the relationship between the frequency of the of the vibrating electrons and the frequency of the wave produced?
They are the same
The transmission of sound requires a material medium. What is considered to be a poor conductor of sound?
Air
How do sound waves react when parts of the wave fronts travel at different speeds?
They bend
The superposition of two identical transverse waves in a phase produces a wave of?
Increased amplitude.
The reason why ink on a paper appears to be black is due to what?
Absorption
1/60 second.
The speed of sound in dry air at 0 degrees celsius is about 330m/s. How would this speed change if water vapor was present in the air?
The speed would increase
What is the reason why submarines are able to hide in "blind spots" and be undetected underwater?
Refraction of sound due to temperature difference.
Antinoise devices use what type of sound interference to cancel sound compressions?
Destructive sound interference
What type of surface would diffuse reflection occur?
Rough surfaces
What is the unit of frequency FM radio waves are measured in?
A radio loudspeaker is a paper cone that vibrates in rhythm with what?
an electrical signal
What is the technique that allows us to "see" the interior of the body during ultrasounds?
Ultrasound echo technique.
What type of waves are produced when two sets of waves of equal amplitude and wavelength pass through each other in opposite direction?
Standing waves
What is the property that may cause a stick to appear bent in water?
Refraction of light