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# EM notes Blanks

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```Electromagnetic Spectrum Notes
Name____________________________
1) The Electromagnetic Spectrum

What is the Electromagnetic Spectrum?

The electromagnetic spectrum is
complete
spectrum
______________________
________________
of all
forms of “light”.

An electromagnetic wave consists
of electric
and
magnetic
____________________
________________fields
which
vibrate - thus making waves.
2) What is the Electromagnetic Spectrum?

The electromagnetic spectrum consists of:

radio waves
________________

cell phone waves
________________

microwaves
________________

infrared waves
________________

visible light waves
________________

radar waves
________________

ultraviolet vaves
________________

x-ray waves
________________

gamma waves
________________

Properties of electromagnetic waves include
3) Waves
speed, frequency, and wavelength
__________________________________________

Speed (s), frequency (f) and wavelength (l) are related in
the formula:

s=f times a
___________________________

3
All light waves travel at a speed of _________
x 10 eights m/s a vacuum
__________________in
4) Relationship Between Wavelength &amp; Frequency

All parts of the electromagnetic spectrum travel
some speed
at the __________________

Therefore, wavelength and frequency have
an indirect relationship
____________________________________

This means that as one characteristic
decreases
increases, the other ________________

In other words, as wavelength increases,
frequences
____________________________
5) Relationship Between Wavelength &amp; Frequency

As wavelength decreases, frequency will?

increase
___________________
6) Wavelength, Frequency, Energy

Electromagnetic wave characteristics:
high frequency
short wavelengths have a ___________________
long wavelengths have a ____________________
low frequency

Electromagnetic waves &amp; Energy:
high energy
high frequency waves have __________________
low energy
low frequency waves have ___________________
wavelength
long
short
frequency
low
high
Fill in the table below
7) Wavelength &amp; Energy (sketch drawing below!)
8) Radio waves
energy
low
high

longest wavelength
Low energy waves with ____________

Includes FM, AM, radar and TV waves

1m
Wavelengths of _____________
and longer

Low frequency

control items
Used in many devices such as remote
_______________,
cell phones ________________,
wireless devices etc.
___________,
9) Microwaves

longer
Only radio waves are ________________

Wavelength 1 x 10 1 m to 1 x 10 4 m (1 m to 0.001 m)

medicine
used for communication, ________________and
consumer use (microwave ovens)
10) Infrared waves

Invisible electromagnetic waves that are detected
as heat
________

Can be detected with special devices such as
night goggles
_____________________________

heat lamps
Used in _________________
Higher energy than microwaves but lower than
visible light
_____________
11) Visible Light
The portion of the electromagnetic spectrum that human
detect
eyes can _____________
royg btv
______________________
(red, orange, yellow, green,
blue, indigo, violet)
Which color has the lowest frequency?
red has the lowest frequency violet the highest.
________________________________________
12) Ultraviolet waves

high energy
____________________
than light waves

skin cancer and blindness in humans
Can cause ____________

tanning beds
Used in _______________
and sterilizing equipment
13) X Rays

High energy waves

astronomy
Used in medicine, industry and ______________

Can cause cancer

Highest energy

Blocked from Earth’s surface by
14) Gamma rays
atmosphere
______________________

What is the relationship between frequency and wavelength?
The waves speed is constant, frequency increases and wavelength
________________________________________________
What characteristic of gamma waves gives them their high energy?
They get it by extremely short wavelength
________________________________________________________
What does ROY G BIV mean? What part of the electromagnetic spectrum does it refer
to?___________________________________________________________________
It's red, orange, yellow, green, blue, indigo, and violet.
Yellow is more energetic then red because it has a short
Which color is more energetic, red or yellow?__________________________________
They travel at the same speed.
Which type of wave travels faster, gamma or radio?_____________________________
Why are microwaves more dangerous than radio waves?_
There more dangerous, then radio waves because they have higher frequency carry more energy.
______________________________________________________________________
______________________________________________________________________
```