Wave Properties
The highest point of a wave.
What is the crest?
A wave bounces off a surface and changes direction.
What is reflection?
Sound waves begin when an object does this.
What are vibrations?
A material that lets light pass through so objects are seen clearly.
What is transparent?
Light can travel through this space that contains no matter.
What is a vacuum?
The distance from the rest position to a crest or trough; compared as higher or lower
What is amplitude?
A wave transfers energy to the material it hits.
What is absorption?
Sound is this type of wave because it requires matter to travel.
What is a mechanical wave?
A material that lets light through, but objects look blurry.
What is translucent?
Wave A passes a point 8 times per second; Wave B passes 3 times per second. This wave has the highest frequency.
What is wave A?
The number of complete waves passing a point in a given amount of time
What is frequency?
A wave passes through a material.
What is transmission?
The sound heard again after sound waves reflect off a surface.
What is an echo?
A material that does not let light pass through.
What is opaque?
One is a mechanical wave: ocean or light
What is an ocean wave?
Wave A has crests 9 cm apart; Wave B has crests 4 cm apart. This wave has the longer wavelength.
What is Wave A?
A light ray bends as it enters water because its speed changes between media.
What is refraction?
The main job of acoustic panels in a theater is to do this to sound energy.
What is absorb sound?
A red opaque object appears red because it reflects this color and absorbs much of the others.
What is the color red?
Name one condition to keep the same when testing which material reduces sound best.
Ex: Same sound source/ volume, distance, material placement, or testing environment.
A wave has taller crests than another wave, but no cycle-count information is given. What can you conclude, and what can’t you conclude?
It has greater amplitude; frequency cannot be determined from amplitude alone.
You shout near a wall and hear the sound again. Which interaction causes the echo and how?
Reflection: sound waves bounce off the wall and return
Sound bends around an opening or doorway. What sound behavior is this?
What is diffraction?
A smooth mirror forms a clear image; a bumpy wall scatters light. Name the reflection types in order.
What is regular reflection and diffused reflection?
A ray diagram shows light entering water from air and changing direction. What does this show, and why does it happen?
Refraction; light changes speed as it enters a different medium, causing it to bend.