Properties
Interactions
EM Waves
Sound Waves
Vocab
100
What are the highest & lowest points of a wave?
highest - crest
lowest - trough
100
What interaction is pictured below?
transmission
100
Which type of EM waves have the longest wavelength?
Radio waves
100
What is sound?
Sound is a disturbance that travels through a medium as a longitudinal wave.
100
A disturbance that sends energy through matter or empty space
wave
200
What is the height of the wave from the equilibrium line?
amplitude
200
What interaction is pictured below?
Diffraction
200
What is the only EM wave you can see?
Visible light (ROYGBIV)
200
How is amplitude, intensity, and loudness related?
They all increase or decrease together!
The higher amplitude a sound wave has, the more intense the sound is, the louder it is.
200
The number of waves that pass a given point in a certain amount of time.
Frequency
300
The natural resting position of a wave
equilibrium
300
What happens when light hits a black t-shirt verse a white t-shirt?
Black t-shirt: it absorbs the light (gets warmer)
White t-shirt: it reflects the light (stay cooler)
300
Compare Gamma Rays to Radio Waves.
Use words: frequency, wavelength & energy
Gamma Rays: high frequency, short wavelength & high energy
Radio Waves: low frequency, long wavelength & low energy
300
How are frequency and pitch related?
High pitch = high frequency
Low pitch = low frequency
300
If wavelength increases, what happens to its frequency?
decreases
400
How do you measure wavelength on a transverse wave?
Crest to crest
or
Trough to trough
or
distance of one complete cycle
400
If you shine a white light on a blue gummy bear, what happens to R,O,Y,G,B,I and V?
R,O,Y,G,I,V get absorbed.
Blue gets transmitted.
400
How does visible light separate in a prism?
Refraction, light going through a prism separates white light into colors because of their different frequencies
slower wave (red), faster wave (violet)
400
What type of medium do sound waves move fastest in? slowest in? Explain why.
Fastest - solid
Slowest - gas
Sound moves faster when molecules are closer together and stiffer, allowing the energy to transfer quickly.
400
What does it mean when a wave's amplitude decreases?
its energy decreases
500
Label the below diagram
(Must have all properly labeld to receive the points)
1.
1. wavelength
2. trough
3. amplitude
4. crest
5. equilibrium
500
Why does a pencil look bent when in a glass of water?
A pencil appears bent in water due to refraction, where light changes speed and direction when passing between air and water (different mediums).
500
List the order of the EM spectrum from highest to lowest frequencies.
Gamma rays, X rays, UV rays, visible light, infrared light, microwaves, radio waves
500
Explain how the doppler effect works.
Be specific!
Doppler effect is the change in pitch caused by motion of the source or observer.
500
A type of wave/ radiation that can travel through space.
Electromagnetic Waves