ICP Waves Final Study Guide
What is the equation for frequency?
f=1/T
All electromagnetic radiation is harmful to humans.
false
Electromagnetic waves need a medium in order to transfer energy.
false
Which region of the electromagnetic spectrum has the highest frequency?
gamma rays
What is true about an electromagnetic wave that has a short wavelength?
it has high frequency and high energy
What is the fastest place sound travels?
liquid
What effects the speed of sound?
medium and temperature
What happens to air when sound moves through it?
particles of air will be displaced both rightward and leftward as the energy of the sound wave passes through it (longitudinal wave)
What are two examples of interference?
proactive interference and retroactive interference
Which region of the electromagnetic spectrum has the lowest frequency?
radio waves
What are the major regions of the electromagnetic spectrum in order?
radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays
What is the list of electromagnetic waves from longest to shortest wavelength?
radio, infrared, ultraviolet, gamma
An echo is an example of the type of wave interaction called ___________
reflection
_________________ occurs when light bounces back from a surface that it cannot pass through
reflection
Matter is opaque if it ________________
reflects and absorbs light
__________ occurs because the waves start traveling at a different speed in the new medium
refraction
If a ray of light bounces off of a surface what would the material be made of?
shiny metal
What is the slowest place sound travels?
solids
What is the equation for wavelength?
speed/frequency
Absorption of light increases the ___________ of matter because light transfers its energy to matter when it is absorbed.
temperature
What is refraction?
the bending of waves due to a change in speed
What is interference?
the combination of two or more waves that results in a single wave
What is the wavelength of an electromagnetic wave?
the distance between the peaks of two waves that are next to each other
What are the relationships between frequency and wavelength?
the higher the frequency, the shorter the wavelength
How are electromagnetic radiation/waves generated?
they are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation.
Electromagnetic waves are _____________
transverse waves
What is the equation for wave speed?
wave speed = frequency x wavelength
Color is the brain's interpretation of a light wave's _________
wavelength
What are longitudinal waves?
waves that travel side to side (forwards and backwards)
What are transversal waves?
waves that travel up and down
What is reflection?
when light bounces off an object
What is the speed of light in a vacuum?
300 million meters per second
What is the Doppler effect?
An observed change in the frequency of a wave when the source or observer is moving
What is diffraction?
The bending of waves around a barrier
When placed in sunlight, what material would absorb the most light energy?
a black sweater
Electromagnetic waves can vary greatly in their wavelengths. The LONGEST wavelengths can be about the size of ________________-
a building
When electromagnetic waves strike matter they may be _______________
absorbed, refracted, and reflected
What is the second fastest place sound travels?
air
If a ray of light goes through a surface what would the material be made of?
clear plastic
