Electromagnetic Waves (+ Scientists)

Electromagnetic waves

transverse waves

Electrical and magnetic fields are _ to the direction of the wave propagation

perpendicular

Electromagnetic waves _ travel through a vacuum at the speed of light

can

Electromagnetic waves _ need a medium to propagate

does not

Electromagnetic Radiation

Refers to the energy emitted

Electromagnetic Spectrum

entire range of EM Radiation

Crest

highest point, the peak of the wave

Trough

lowest point, opposite to the crest

Amplitude

maximum displacement, measures how far the particles move

Node

point where the wave has zero amplitude

The larger the amplitude, the _ energy

more

Wavelength (A) length of one _ wave cycle

complete

Is measured in meters (m)

Wavelength

Frequency

Amount of complete wave cycles the that pass a given point per unit of time

Hertz (Hz)

Measurement used for frequency

Frequency is _ related to wavelength

inversely

Energy

They are directly related: as frequency increases, _ increases

Radio Waves

lowest frequency, longest wavelength

What EM wave is used for broadcasting (AM and FM) 1

Radio Waves 1

What EM wave is used for television 2

Radio Waves 2

What EM wave is used for cooking 1

Microwaves 1

What EM wave is used for radar systems 2

Microwaves 2

What EM wave is used for Bluetooth 3 

Microwaves 3

What EM wave is used for satellite communication 4

Microwaves 4

Es'hailSat

Qatar Satellite Company

"Es'hail"

Arabic name for Canopus

Infrared

Also called heat radiation

What EM wave is used for remote controls 1

Infrared 1

What EM wave is used for thermal imaging 2

Infrared 2

Visible Light

small portion of the EM spectrum that allows us to see the world around us

What EM wave is used for vision 1

Visible Light 1

What EM wave is used for photography 2

Visible Light 2

Ultraviolet Rays

Main source of sunlight

What EM wave is used for sterilization 1

Ultraviolet Rays 1

What EM wave is used for medical uses 2

Ultraviolet Rays 2

Xrays

Ionizing radiation

What EM wave is used for medical imaging 1

Xrays 1

What EM wave is used for security scanning 2

Xrays 2

Gamma Rays

highest frequency, shortest wavelength

What EM wave is used for cancer treatment 1

Gamma Rays 1

What EM wave is used for sterilization 2

Gamma Rays 2

William Gilbert

Introduced electricus

Hans Christian Orsted

electric current is surrounded by magnetic field

Michael Faraday

Electromagnetic Induction

Joseph Henry

induced current

James Clerk Maxwell 1

scientific theory about electromagnetic waves .

James Clerk Maxwell 2

describes how electric and magnetic fields interact . .

James Clerk Maxwell 3

EM waves travel at the speed of light, meaning light itself is an EM wave . . .

Heinrich Hertz 1

proved the existence of radio waves .

Heinrich Hertz 2

Scientist based off 1 cycle/ second unit . .