Wave Properties
What do you call the highest point of the wave?
crest
mechanical waves require a __________ to tranfer energy
medium
What mnemonic device do you use to remember the order of colors of the rainbow?
ROYGBIV
What do you call a wave that can travel and transfer energy without a medium?
electromagnetic wave
define "signal"
data that carries information
What do you call the lowest point of a wave?
trough
Give me an example of a mechanical wave
water waves, sound waves
When all colors are reflected what do you see?
White
The wavelengths of the electromagnetic spectrum are measured in what units?
nanometers
Give me an example of an analog signal
earthquakes, vinyl record recordings, radio signals
What do you call the number of waves per second?
frequency
What is reflection in a wave?
When a wave bounces off an object and is directed back into the original medium
Explain refraction of light
when the light ray is bent upon going through certain materials
What type of wave does the electromagnetic spectrum start with?
radio waves
Give me an example of a digital signal
digital music, television streaming
The height of a transverse wave from the midline is called....
amplitude
What do you call the movement of a wave through a medium or into a new medium?
transmission
What process causes a prism to make a rainbow?
refraction
What type of electromagnetic wave is the most dangerous?
gamma rays
What is binary code?
a code to record signals using 1's and 0's
Draw a wave and label the wavelength
answers vary
When a mechanical waves goes into a new medium, what is something that changes?
wavelength, speed
How does absorption play a role in the colors we see?
We only see the color that is reflected, the rest are absorbed
What range of nanometers can humans see
400-800nm approximately
What is one way digital signals are transmitted?
electrical pulses
fiber optics
electromagnetic waves
Draw a wave and label the crest, trough, and amplitude
answers vary
Explain absorption of a wave
the conversion of a wave's energy into another type of energy when it encounters a new medium
What has to happen to see the color black?
All colors are absorbed
Put the following in order from lowest to highest frequency:
Infrared, gamma, microwaves, visible light, radio, UV, x-rays
radio, micro, infrared, visible, UV, Xrays, gamma
Give me two advantages to digital signals
less interference, more security, more reliable