Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
What are transverse waves that have some electrical properties with some magnetic properties?
|
ELECTROGANMETIC WAVES
|
|
Do electromag. waves require a medium through which to travel?
|
NO
|
|
How do electrogmagnetic waves travel?
|
As VIBRATIONS in electric and magnetic fields
|
|
What is the energy transferred by electromag. waves called
|
ELECTROMAG. RADIATION
|
|
How fast can electromag. waves go ?
|
300,000,000 meters per second-speed of light.
|
|
If the wave length is shorter the frquency is ____?
|
HIGHER
|
|
Light has properties of both_____ and _____.
|
particles and waves
|
|
Polarized light is light that ___?
|
passes through a polarized FILTER
|
|
Photoelectric effect is movement of particles called______.
|
ELECTRONS
|
|
PACKETS OR PARTICLES OF ENERGY IS ?
|
photons
|
|
All electromag. waves travel at the ____ speed, but they have ____ wavelengths and frequencies
|
SAME
DIFFERENT |
|
SPEED = what?
|
Wavelength x Frequency
|
|
The name of the range of electromag. waves 3hn they are place in order of increasing frequency is _______ ______.
|
ELECTROMAG. SPECTRUM
|
|
Radio waves have the _____ wavelength and the _____ frequency.
|
longest
lowest |
|
Microwaves have the ____ waves and the ____ frequency.
|
shortest
highest |
|
Radar is called also ___ ___ ___ ___.
|
Radio Dection And Ranging
|
|
What kind of waves are sent out and reflected back by objects they strike?
|
RADAR
|
|
What is an MRI? and what does it do?
|
Magnectic Resonance Imaging are radio waves and strong magnetic fields that cause atoms in the body to line up in the same direction . They return to their original direction an create a picture
|
|
Which kind of waves are shorter wavelengths and higher frequences but it is felt as heat?
|
Infrared rays
|
|
What does infra mean?
|
below-so it is below red
|
|
A thermogram shows what/
|
Different temperatures in different colors.
|
|
Visible light has ____ wavelengths and ____ frequences than an infrared wave
|
shorter
higher |
|
Which rays have wavelengths SHORTER than that of visible light.
|
ULTRAVIOLET RAYS
|
|
UV Ultra is Latin for what?
|
Latin for BEYOND. so it means beyond violet.
|
|
___ doses are beneficial of ultrviolet to kill ____but ___ doses can cause _____.
|
SMALL
MICROORGANISMS LARGE |
|
Name three things about XRAYS?
|
1) VERY SHORT wavelengths.
2) because of high frequency they carry more energy and can penetrate most matter 3) Too much exposer can cause cancer. |