Download NASA Electromagnetic Spectrum Video Notes

NASA Electromagnetic Spectrum Video Notes
http://missionscience.nasa.gov/ems/emsVideo_01intro.html
Electromagnetic Spectrum Introduction: http://www.youtube.com/watch?v=cfXzwh3KadE
1.
EMS stands for ______________________________________________
2.
EM waves have _____________________ and ____________________ properties.
3.
EM waves travel at the speed ____________________________.
4.
Longer EM wave have lower frequencies and less __________________.
5.
Objects have color because EM waves interact with the molecules, with some being
_________________ and others __________________________.
6.
Everything around us __________________, ___________________, and ___________________ EM
radiation differently.
Radio Waves: http://www.youtube.com/watch?v=al7sFP4C2TY
7.
Guillermo Marconi’s first radio transmissions in 1894 have spread in space at the speed
______________.
8.
Radio waves are the _______________ and contain the ________________________ of any
electromagnetic wave.
9.
Scientists need giant antennas to detect ________________________________ radio waves from space.
10.
Astronomical objects that have a ___________________________ usually produce radio waves.
11.
Radio waves fill the space around us to bring __________________________,
______________________, and _________________________________.
12.
We can’t “hear” these radio waves. The radio ________________________ these electromagnetics
radio waves, and then _________________ a speaker to create the sound waves we hear.
Microwaves: http://www.youtube.com/watch?v=YgQQb1BVnu8
13.
Microwaves can ______________________________, ____________________________________,
and ______________________________________________.
14.
With wavelengths between _______ cm and _________ mm, they fall between ________________ and
_______________.
15.
Microwaves are used in weather forecasting in ____________________________________.
16.
Different wavelength of microwaves are grouped into bands; _____, _____, _____, _____, and _____.
17.
C-band microwaves penetrate through _________, ___________, ____________, _______________,
and ____________ to reveal the earth’s surface.
18.
L-band microwave are used by _________________________, such as the one in your car.
Infrared: http://www.youtube.com/watch?v=i8caGm9Fmh0
19.
When you use a remote control, it uses light _________ the visible light we use to see.
20.
The region beyond the red region of the visible spectrum was __________ than all the other colors.
21.
We can sense some of this infrared energy as ___________.
22.
Some objects are so hot, the also emit visible light. Other objects are not as hot and only
___________________.
23.
We cannot see these infrared waves with our eyes alone, however, instruments than can sense infrared
energy, such as _______________________ or ________________________, allow us to see these
infrared waves from warm objects
24.
A portion of the solar radiation that is just beyond the visible spectrum is referred to as _________
infrared.
Visible Light: http://www.youtube.com/watch?v=PMtC34pzKGc
25.
All electromagnetic radiation is ______________.
26.
__________________is the only part of the spectrum we can see.
27.
Those visible light appears white, it is made up of the individual rainbow colors, ranging from
___________, at 380 nm, to _____________, at 700 nm.
28.
Scientists can learn the composition of an atmosphere by considering how atmospheric particles
___________ visible light.
29.
Earth’s atmosphere generally looks blue because ____________________________________________
___________________________________________________________________________________.
30.
When the Sun is low in the sky, __________________________________________________________
____________________________________________________________________________ and only
the longer red and yellow wavelength can pass through.
31.
As object grow hotter, they radiate energy with a ________________ wavelength.
32.
In the same way, the color of stellar objects tell much about their temperature. Our sun produces more
yellow light because of its surface temperature (________ ºC). If it were cooler (__________ºC), it
would look ___________, like the stars Antares and Betelgeuse. If the sun were hotter (__________ºC),
it would look _________like the star Rigel.
Ultraviolet Rays: http://www.youtube.com/watch?v=QW5zeVy8aE0
33.
Just like dogs can hear just outside the range of our hearing, bugs can see just outside the range our eyes
can see. A bug zapper emits this _________________ light to attract bugs.
34.
The ultraviolet region can be subdivided into three regions, ________, __________, and ____________.
35.
________, long wave ultraviolet is the closest to visible light. _____________ also reaches the Earth’s
surface.
36.
Shorter wavelengths, called _________ are the harmful rays that cause sunburn. Fortunately _________
of these harmful rays are observed by _____________ in the Earth’s atmosphere.
37.
_________ are the shortest and most harmful and are almost completely absorbed by our atmosphere.
38.
Young hot stars shine most of their light beyond the visible light spectrum at ultraviolet wavelengths.
Scientists need telescopes ___________________________ the Earth’s UV absorbing atmosphere.
X-Rays: http://www.youtube.com/watch?v=CCAYcuCWOnM
39.
A star explodes in a blinding supernova spraying _____________ across the galaxy to tell its tale.
40.
X-rays are ________ energy light waves.
41.
In laboratories, scientists fire beams of _________ at unknown substances to learn _________________
_____________________________ and to decode __________________________________________.
42.
X-rays can also reveal an object’s _____________________, since __________________________
determines the wavelength of its radiation.
43.
X-rays come from objects that seethe at ___________________ degrees.
44.
X-rays at different wavelengths provide information about an object’s _________________________,
____________________, ____________________, or its __________________________________.
Gamma Rays: http://www.youtube.com/watch?v=TA5SLDiIUWs
45.
Created by the hottest, most violent and most energetic objects and events in the universe,
__________________ travel across vast stretches of space, only to be absorbed by Earth’s atmosphere.
46.
Deadly to humans, gamma rays are created on Earth by natural _____________________________, by
_____________________________, and even by ________________________________________.
47.
Monitoring these gamma rays provide scientists with an early warning of incoming charged particles
that may cause disruptions in ___________ and ____________________networks.
48.
The _________ energetic of all EM waves, __________ carry enough energy ____________ living
cells.
49.
Doctors are able to selectively use gamma radiation to destroy _________________________.
50.
Gamma rays stream from ________, ________________, ______________________, and __________
to wash our sky with gamma ray light.