The Electromagnetic
Spectrum
Mrs. Pagano
Physical Science 10 CP
What Is The Electromagnetic
Spectrum?
The electromagnetic spectrum is a scale that
shows all the different wavelengths and
frequencies of energy waves in our world
How is The Electromagnetic
Spectrum Organized?
Decreasing Wavelength
Increasing Frequency
Longest Wavelengths-Lowest
Frequency
 Radio waves have the longest wavelengths
on the Electromagnetic Spectrum and the
lowest frequency
 Gamma Rays have the shortest
wavelengths on the Electromagnetic
Spectrum and the highest frequency.
 Inverse relationship between wavelength
and frequency
Visible Spectrum
 The visible spectrum includes all of the
wave energy in white light that we cannot
see unless the light waves are refracted or
bent. If you pass visible light through a
prism, we can see all of the different wave
energy for each color of the rainbow from
longest (red) to shortest (Violet)
The Beauty Of Diffraction
Iridescent is derived from the Latin
iris, which means "rainbow "
Colors are created by the refraction
of light waves rather than by a
pigment.
What we see
What They See
 Snakes such as boa constrictors and pit vipers
use infrared to see their prey. In any kind of
lighting or weather condition, these snakes can
see the body heat coming off their victims through
the infrared spectrum, which allows them to strike
with deadly accuracy. Some snakes, such as
boas, can actually see the world in two ways:
through normal and infrared vision.
Fish and Infrared
 Some species of fish, such as piranha and goldfish, can
see in infrared light. This is useful to them in murky waters,
where the shorter rays of the color spectrum can be broken
and diffused, whereas the longer infrared rays can go
further in the water. Many of these fish also see the world
in color.
Read more: Animals That Can See Infrared Light |
eHow.com http://www.ehow.com/list_6910261_animalscan-see-infrared-light.html#ixzz1kbqFj2Gn
Mosquitoes
and Infrared
 The bloodsucking mosquito uses infrared to
hone in on the blood rich parts of its prey.
 Mosquitoes primarily use sight and smell
until they get within 10 feet of their prey, at
which point heat vision takes over.
DOPPLER EFFECT
REDSHIFT/ BLUESHIFT