Electromagnetic Spectrum
An Electromagnetic wave (light) travels fastest in a gas or a vacuum.
Gas
Sound travels fastest in a _______ (solid, liquid, gas)
SOLID
Increasing the amplitude of a sound wave does what to the volume? Increase or decrease?
increases
Draw a longitudinal wave and label areas of compression and rarefraction.
picture time
True or false: A wave can only travel through one medium type, and then it breaks if it hits a different medium.
Explain your reason
False, Light waves can travel through air and then penetrate the surface of water
True or false: Is the entire electromagnetic spectrum visible? Name an example.
False, example: x-rays are not visible
True or false: Waves only transfer materials. Name an example in your explanation.
False. Waves only transfer energy, such as sound causing energy to move rather than the air molecules the sound comes in contact with
When a wave hits an object and then bounces back it is ________________.
a. reflection
b. refraction
c. absorption
a. reflection
If you are hearing your neighbors music through the wall the sound wave is being ____________
a. absorption
b. convection
c. transmission
c. transmission
The only part of the Electromagnetic spectrum we see is _______________.
Visible Light
True or false: Electromagnetic waves are the only waves that can physically move an object. Name an example.
False. There is no matter in space, and light waves can travel to earth from the sun.
What is the definition of a wave?
A vibration/disruption of molecules caused by the transfer of energy
In which type of wave do the waves move perpendicular (or up and down, and side to side) to the movement of energy?
a. transverse
b. longitudinal
c. seismic
a. Transverse
Extra 200 points for everyone :)
none
Why are humans unable to hear x ray waves?
A- they don't cause matter to vibrate to produce sound
B- they have a higher frequency than humans can hear
C- they have a larger amplitude than humans can hear
A- they don't cause matter to vibrate to produce sound
What about white light is true?
A- it is a combination of all wavelengths or colors
B- it is a combination of red and blue
C- it has no EM energy
A- it is a combination of all wavelengths or colors
Why can't sound travel in space or a vacuum?
Sound must have matter/medium to move through
What is the property when a wave changes speed and direction as it moves from one medium to another ______________.
refraction
Why would a light wave travel faster in water than in air?
air has less molecules and will not transfer energy well
How does a rogue wave form?
The crests of two waves meet together and create one large wave.
Name that term: the number of wavelengths passing by a fixed point in one second is?
Frequency
What type of wave is going to led to more devastating seismic activity: p-waves or s-waves?
S-waves - they led to more destruction because they only move through solid materials and the seismic waves get stronger as they move through solids
How do light waves interact with a black shirt differently than with a white shirt? Hint: name 2 properties.
black absorbs light waves, white reflects light waves
What word is used to describe an object that light cannot go through?
Opaque
How do humans perceive light?
Objects absorb the color and reflect it back to your eyes