Chap 12 Flashcards
(23 cards)
A carrier wave is what?
Carrier wave is used for specific frequency used by radio stations
Electromagnetic wave spectrum
Radio wave Microwave Infrared waves Visible light Ultra violet X-rays Gamma rays
Types of carrier waves
AM&PM
AM signals send the info about the photo
TRU OR NAH
TRU
FM Signals send the audio
TRue or nah
True
What is fm radio
Frequency modulation
AM stands for
Amplitude modulation
What colors does a cathode ray tube use to form a image
Red blue green
This object has 3 electron beams that form the image you see
A cathode ray tube
Gamma rays are known for what?
Being the most dangerous and is produced by the processes occurring in atomic nuclei
Ultraviolet waves are known for ?
Causing sun damage
Is used in forensics to detect finger prints and body fluids
X-rays are use to take pictures of bones &coffee internal organs
True
This wave is used to control remotes,CDs, and detecting thermal energy
Infrared waves
This is the only electromagnetic waves human can see
Visible light
What waves are used in telephones
Radio waves and microwaves
What is the name for the energy carried by electromagnetic waves
RADIANT ENERGY
What is Tge speed of E.wave
300,000 km/s
When is the electromagnetic waves travel the slowest
When it is going through a solid
What are e.waves known to behave as
Photons
Simple characteristics of an electromagnetic wave ?
1All objects admit electromagnetic waves
2E.waves travel by transferring energy b/w vibrating electric &magnetic fields
3Can travel through empty space
Microwaves are used in
Some communication devices
And microwave ovens
How does the electromagnetic spectrum increase by
It increases by frequency
Radio waves are in what tech
MRI’s
Radios
Radar guns
