Electromagnetic Waves

Front 1

What does a transverse wave look like?

Back 1

like a rope waving up and down

Front 2

An electromagnetic wave is a _______ wave

Back 2

transverse

Front 3

T or F...an EM wave can transfer energy or move through space without a medium

Back 3

true

Front 4

an EM wave consists of vibrating ____ and _____ fields that move through space at the speed of _______.

Back 4

electric and magnetic

speed of light

Front 5

light and all EM waves are produced by charged_______

Back 5

particles

Front 6

when a charged particle moves, it produces a ______ field that can push or pull on other charged particles

Back 6

magnetic

Front 7

Energy that is transferred through space by EM waves is called _____ _______

Back 7

EM radiation

Front 8

All EM waves in a vacuum travel at the speed of ________

Back 8

light

Front 9

Light is an ______ wave

Back 9

electromagnetic

Front 10

a polarizing filter only allows light through that is vibrating in one direction, like the slats of a picket fence

Back 10

true

Front 11

thinking of light as a stream of tiny packets or particles of energy is called ___________

Back 11

photoelectric effect

Front 12

each packet of light energy is called a ______

Back 12

photon

Front 13

all EM waves travel at the same speed in a vacuum, but they have different _________ and different _____________

Back 13

wavelengths and frequencies

Front 14

Speed =

Back 14

wavelength x frequency

Front 15

Radiation in the wavelengths that your eyes can see is called ______ ______

Back 15

visible light

Front 16

most wavelengths are ________

Back 16

invisible

Front 17

the higher the frequency of a wave, the higher its ________ is

Back 17

energy

Front 18

the complete range of all EM waves in order from lowest frequency to fastest frequency is ____________ ___________

Back 18

electromagnetic spectrum

Front 19

EM waves from longest to shortest frequency

Back 19

radio, microwaves, infrared rays, visible light (can see), ultraviolet waves, x-rays, gamma rays

Front 20

EM waves with the longest wavelengths and lowest frequencies are _______ waves

Back 20

radio

Front 21

Radio waves include _______ and _________

Back 21

broadcast (radio and TV)

and microwaves

Front 22

A system used to detect objects and measure their distance and speed is called _________

Back 22

radar

Front 23

A little shorter waves than radio waves are ____ waves

Back 23

Infrared

Front 24

Two objects that use infrared rays are ___

Back 24

Heat lamps and Infrared cameras

Front 25

A __________ is picture that measures different temperatures in different colors

Back 25

thermogram

Front 26

The next shortest wave category is ____ light

Back 26

visible

Front 27

Shorter than visible light is __________ rays

Back 27

ultraviolet

Front 28

Ultraviolet rays have enough energy to kill ____

Back 28

living cells and bacteria

Front 29

Ultraviolet rays can cause___

Back 29

sunburn, skin cancer, eye damage

Front 30

Next shortest waves are _______

Back 30

x-rays

Front 31

T or F....x-rays can pass through most matter

Back 31

true

Front 32

________ rays are the shortest wavelength

Back 32

gamma

Front 33

gamma rays are used in hospitals to ____

Back 33

diagnose and treat cancer

Front 34

Light

An object is ______ if it gives off light

Back 34

luminous

Front 35

Use a s__________ to view the different colors of light produced by a light bulb

Back 35

spectro-scope

Front 36

An i_______ l_________ is a light bulb that glows when a filament inside gets white hot

Back 36

incandescent light

Front 37

a bulb that contains a halogen gas is a T____-H___ bulb

Back 37

tungsten-halogen

Front 38

Bulb filled with a gas and with glowing powder is a f_____________ light

Back 38

flourescent

Front 39

a street light is a v_______ light and has hot gas in it

Back 39

vapor

Front 40

N______ light is a sealed glass tube that contains n_______ gas

Back 40

neon

Front 41

Radio and TV

A______ send out or receive radio waves from one broadcasting station to another

Back 41

antennas

Front 42

AM stands for ________ ___________

Back 42

amplitude modulation

Front 43

AM waves are bounced off of the E______'s ionosphere, therefore AM radio stations can broadcast over long distances

Back 43

Earth's

Front 44

FM stands for

Back 44

Frequency modulation

Front 45

the amplitude (crest/trough) of FM waves stays ________

Back 45

constant or even

Front 46

Just like light wavelengths have a spectrum from radio to gamma waves, so radio waves have a spectrum of __________

Back 46

hertz

Front 47

a hertz is one _________ per second

Back 47

cycle

Front 48

cell phones transmit and receive signals using h________f_____________ microwaves

Back 48

high frequency

Front 49

Communication s__________ receive radio, TV and telephone signals and relay the signals back to receivers on earth

Back 49

satellites

Front 50

GPS stands for...

Back 50

global positioning system