EM WAVES Flashcards
waves
that are created as a result of vibrations between
an electric field and a magnetic field.
Electromagnetic wave
waves
that are created as a result of vibrations between
an ________ field and a ______ field.
Electric and magnetic
Wave that does not require a medium to propagate
EM wave
Wave that requires a medium
Mechanical wave
Give 5 uses of EM wave
Microwave
Phones
Xray
Radio
Night vision goggles
A scottish scientist that developed a scientific theory to explain electromagnetic waves.
James Clerk Maxwell
Relationship between magnetism and electricity
Maxwell’s Equation
Number of em waves in the electromagnetic spectrum
7
longest em wave
Radio wave
It has infinite distance
Radio wave
Shortest yet most destructive ray
Gamma ray
How many x rays per year is prescribed?
2 (every 6 months)
EM waves that can penetrate any object
Gamma ray
We see because of ______ waves
Light waves
Electric firld travels ____
Vertically
Magnetic waves travels _____
Horizontally
Unit of frequency of a radio wave
Hertz
A german physicist that applied the idea of maxwell
Heinrich Hertz
Is the velocity of radio waves and light equal?
Yes
Velocity of light
3.00 x 10⁸ m/s
He invented the reception of radio waves
Heinrich Hertz
Can electric and magnetic wave travel separately?
Yes
A particle with discrete packets of energy
Photons
It is made out of discrete packets of energy called photons
Light
Light is both a ____ and a _____
Wave and particle
It refers to the same physical phenomenon of light, em waves, and radiation
Electromagnetic energy
3 ways to describe EM energy
Frequency, wavelength and energy
Number of crests tnat pass and given point within 1 second
Frequency
Top part of a wave
Crest
Bottom part of a wave
Trough
Distance between one crest to another crest
Wavelength
relationship of wavelength and frequency
wavelength and frequency is inversely proportional
Relationship between frequency and energy
frequency and energy is directly proportional
One wave or cycle per second is called
Hertz
It is the range of all types of radiation
EM spectrum
Energy that travels and spreads put as it goes
Radiation
It comes from the lamp of your house
Visible light
Comes from radio stations
Radio wave
Used in microwave ovens
Microwave radiation
Used in night goggles
Infared
Emitted by sun and causes our skin to tan
UV light
Used to image teeth
Xray
Used by airport security to check your bag
Xray
The biggest gamma ray generator
Universe
Doctors use it to see the imaging of our body
Gamma ray
