Parts & Properties
Calculator Time
Interxns
EM Waves
100
What do we call the highest peak and lowest valley in a transverse wave?
Crest and trough
100
How do you find the speed of a wave?
Speed = Wavelength x Frequency
100
Reflection
100
What is a photon?
The massless particle in light that also acts like a wave.
200
What parts of a wave are used to measure wavelength?
Crest to crest (or trough to trough)
200
What units do you use for wave speed, wavelength, and frequency?
m/s for speed, m for wavelength, Hz for frequency
200
Transmission
200
What was the famous experiment that let us discover that light is both a wave and a particle?
Double Slit Experiment (window experiment)
300
What kind of wave is a sound wave? It's the opposite of what a light wave would be.
Mechanical
300
An ocean wave was measured to have a wavelength of 3 m and a frequency of 4 Hz. What is the speed of this wave?
Wavelength x Frequency = Speed
3 x 4 = 12
12 m/s
300
Absorption
300
List the EM waves in order from lowest to highest frequency:
Radio, microwaves, infrared, visible light, UV, X rays, Gamma rays
400
What part of a wave measures how much energy the wave has? It would tell you the difference between the energy in a tsunami and the energy in a pond ripple.
Amplitude
400
An ocean wave is moving very fast towards the shore, 45 m/s. It has a frequency of 6.4 Hz, so what is it's wavelength?
Speed = Wavelength x Frequency
45 = wavelength x 6.4
7.03 m
400
Refraction
400
What EM Wave has the shortest wavelength and highest energy?
Gamma
500
Which color of light is the fastest (aka, has the highest speed?)
Trick question! The speed of light is constant (it's the same for every color!)
500
Sound waves travel at about 343 m/s. The wavelength of particularly low note is about 4 m long. What is the frequency of this low note?
Speed = Wavelength x Frequency
343 = 4 x Frequency
85.75 Hz
500
Destructive interference
500
Are radio waves dangerous to humans?
No, they have the lowest amount of energy, you need no protection from radio.