Parts of a Wave
The top of a wave.
What is the crest?
This is the Greek symbol that represents wavelength.
"lambda" λ (must be able to say & draw it)
We can see these waves with our eyes.
What is visible light?
A mirror is an example of this type of interaction.
What is reflection?
You should use this type of light to make things glow in the dark quickly and brightly.
What is ultraviolet light? ("UV rays" okay).
This measures the distance from the center of a wave to a crest or trough.
What is amplitude?
These are the three variables in the wave speed equation: λ f = c
wavelength, frequency and wave speed (just "speed" okay)
These waves have the longest wavelengths in the spectrum.
What are radio waves?
These are the four ways that light can interact with media.
What are absorption, transmission, reflection, refraction?
What was our last unit about trees and photosynthesis called?
Giant Sequoia (not "Photosynthesis")
We use these units to measure wavelength.
What are meters?
All EM waves travel through space at this speed.
300,000,000 m/s ("300 million meters per second" okay). Must include units!
These waves have the highest energy and highest frequency.
What are gamma rays?
Refraction happens when an EM wave changes this property in a medium.
What is change in direction? (Also accept change in speed)
Who are the three Physical Science teachers?
Ms. Garza, Mr. Tierney, Ms. Wiggins
A hummingbird beats its wings an average of 250 times in 5 seconds. What is the frequency of a hummingbird's wings?
50 Hz ("beats per second" okay) Must include units!
An outboard motor generates 2,500 waves per second in its wake, and each wave is about 0.01 meters apart. What is the speed of these waves in the water?
25 m/s (must use units!)
The James Webb Space Telescope looks in this part of the EM spectrum, with wavelengths just longer than red visible light.
What is infrared?
Optical lenses such as contacts and glasses use this type of interaction to help focus light on our eyes.
What is refraction?
We assess you on this skill in every unit, when we ask you to explain a phenomenon using drawings and labels.
What is modeling? ("Final Model" okay)
This is the period of a wave whose frequency is 437Hz?
What is 0.002288 seconds? (must say "seconds") 0.0023 and 0.00239 okay.
The speed of sound in air is 343 m/s. A Caribbean steel drum vibrates up to 30,000 times per second. What is the distance between the sound waves hitting your eardrum?
0.0114 meters (0.0114333 or 0.011 okay) Must use units!
Meteorologists use these waves in Doppler radar systems to sense precipitation in the atmosphere, such as clouds and rain.
What are microwaves?
Blue light passing through a color filter is an example of these two types of interactions.
What are transmission and absorption?
What was our first unit of the year called?
Boat on a Building (not "Tsunami")