Created by: Mrs. Radney’s SI Class
Attention! You will have a short quiz over
the following information on Wednesday
1/12!
The Waves are listed in order from low
frequency to high frequency!
Cool Website with Info on EM spectrum
EM Spectrum
Radio Waves
 Electromagnetic waves that have longer wavelength
than microwaves and are used in communication and
RADAR.
 The frequency range of radio waves is 103-109 Hz.
This shows the
paths that radio
waves take
around and above
Earth’s surface.
Radio Wave Facts
 Radio waves carry signals for TV, AM and FM radio
and cell phones.
 Radio waves have the longest wavelength of the EM
spectrum.
 Radio waves are used in RADAR which is Radio
Detection and Ranging for locating various objects
and prediction of storm patterns.
By: Stephen Dayneka, Madeline Taylor, Katie Hanrahan, Eric Seifert
Microwaves
 Microwaves = radio waves with the shortest
wavelengths.
 10^10 Hz
Microwave Facts
 Microwaves are not easily blocked by trees, buildings,
and mountains. This is why they are used for cell
phone communication.
 Stars give off microwaves.
 Prolonged exposure to microwaves is known to cause
"cataracts" in your eyes, which is a clouding of the
lens, preventing you from seeing clearly.
By: Mrs. Radney (whoever had microwaves never turned
their project into my inbox!!)
Infrared Waves
 Infrared Waves- electromagnetic radiation with
wavelengths slightly longer than visible red light.
 Frequency Range

.003 – 4 x 1014 Hz
Image of 2 people in mid-infrared light
1) Infrared waves give off heat.
2) Heat can be seen with specific devices and
photographic film.
3) Used in night vision goggles & telling the weather.
Katie Riordan, Jenny Yang, Jiayu Liang, Ben Richards
Visible Light
 Visible light is a
certain range of
waves in the
electromagnetic
spectrum that is
visible to the
human eye.
 The range of
visible light is from
4 - 7.5 x 1014 Hz
Here is visible light on the EM
spectrum
Information
 Light is a wave and a photon. In space light moves at
about 300,000 km /second.
 Albert Michelson first discovered this speed by doing a
rotating mirror experiment.
 Glass prisms work by separating white light. White
light is made from multiple colors. These colors move
at different speeds so when split at a angle, they split
into different colors.
By: Adam Katz, Jacob Rogers, Daniel Axner, & Da
Gengster
Ultraviolet Waves (UV)
Definition: The waves of the electromagnetic spectrum
just above the frequency of visible light.
Frequency Range: 7.5x1014 to 3.0x1016 Hz
Ultraviolet flashlight (UV waves
can let humans see things they
couldn’t normally see
Ultraviolet Waves
 10 nm to 400 nm in wavelength.
 It can cause skin and eye damage if exposed.
 It has more energy and a shorter wavelength than
visible light.
By: Shannon Finnerty, Ellie
Gulling, Lily Li
X- Rays
A form of electromagnetic radiation which have very
high frequencies.
 The frequency range is 3 x 10^16 Hz to 3 x 10^19 Hz (30
petahertz to 30 exahertz).
This is the electromagnetic spectrum, where X-rays are highlighted in the red
box.
Shreyas + Jordan + Monika =
Shrodanika
1. X-rays are also called Rontgen
radiation, named after its discoverer.
2. X-rays are used in medicine to
generate images of the human body
behind the skin.
3. X-rays have more energy and shorter
wavelengths than UV, visible,
Infrared, Microwave, and Radio light.
Shreyas + Jordan + Monika =
Shrodanika
 Gamma rays- A high energy short wavelength wave
used for medical purposes, generally for killing
cancerous cells or sterilizing medical equipment.
 Frequency range- 3*10^18<f<3*10^22
This is where gamma rays lie on the electromagnetic scale.
1. Gamma rays have the capability to kill cells.
2. Gamma rays have more energy than any other light ray
in the electromagnetic spectrum.
3. Gamma rays are produced by violent events such as
super nova explosions or radioactive decay.
By: Catherine Chervenak, Krish Lamba, Mark
Oet