Quiz 2 Waves Flashcards
low frequency EM waves with wavelengths longer than 1mm.
Radio waves
Sound waves must be turned into _______ by a radio before you can hear
them.
sound waves
___________________ is used to find position and speed of objects by bouncing radio waves off the object.
Radio Detecting And Ranging or radar
radio waves with wavelengths
less than 30 cm and higher frequency & shorter
Microwaves
use microwaves
between 1 cm & 20 cm for communication.
Cell phones and satilites
In microwave ovens, a vibrating electric field
causes to ___________ rotate billions of times
per second causing friction, creating TE which heated the food
Water molecules
EM with wavelengths between 1mm & 750
billionths of a meter.
■ Used daily in remote controls, to read CD-
ROMs
Infrared lights
Range of EM humans can see from 750
billionths to 00 billionths of a meter.
Visible light
This color has the shorted wavelength
Blue
This colar has the longest wavelength
Red
If all colors are present, they look
White
EM waves with wavelengths from about
400 billionths to 10 billionths of a meter.
Ultraviolet
Longer wavelengths of ultraviolet
UVA
Shorter wavelengths of ultraviolet
UVB rays
How can UV radiation be helpful
Victim an D for bones and teeth
Used to sterilize medical supplies and equipment
Detectives use fluorescent powder to find fingerprints.
