LIGHT AND COLOR
http://son.nasa.gov/tass/images/cont_emspec2.jpg
http://www.ology.amnh.org/einstein/lightmatterenergy/light.html
Visible light is made up of many different
wavelengths
_______________of
light
Your eyes “see”
different sizes of
waves as different
colors
___________
http://www.simontucket.com/_Portfolio/PortLarge/L_Il_Prism.jpg
Myth:
Many people think that plants are
green because they absorb and use
green light in photosynthesis,
BUT . . . .
Image from: http://oogletutorials.com/wp-content/uploads/2007/12/photoshop-lesson-green-leaf-design26.gif
We “see” reflected light
REFLECTED
Light wavelengths that are ___________
bounce back to your eyes . . .
COLOR
and that is the ___________
we “see”
Image modified from: http://www.visibledreams.net/Web/color/color_3.html
These flowers “look YELLOW” because the
absorb ALL of
pigments in the flowers ____________
except
the wavelengths of light ____________
yellow
YELLOW light is
___________
reflected
____________
to
your eyes.
Image by M. VanderWal
This book “looks BLUE” because the dye in the
absorbs ALL of the wavelengths
cover ____________
except
of light ____________
blue.
BLUE light is
_______
reflected
____________
to your eyes.
http://www.michaelhyatt.com/fromwhereisit/bluebook.jpg
Objects “look BLACK” because black
absorbs ALL of the wavelengths
dye ____________
of light.
When wavelengths are absorbed so is the
ENERGY
_____________
of the wave.
That is why wearing a black
T-shirt in the summer feels
warmer than wearing
a white t-shirt.
http://www.eventsonline.ca/events/vowsa/black_shirt.jpg
http://www.hotstuffspas.com/pools_files/sunanim.gif
REFLECTS ALL
The dye in white objects ________________
of the wavelengths of light.
LITTLE energy is ABSORBED
_______
so wearing white
clothing is “cooler”.
http://www.hotstuffspas.com/pools_files/sunanim.gif
http://www.12stitch.com/shop/images/options/Blank-White-Shirt.jpg
Plants gather the sun’s energy with
light absorbing molecules called
pigments
___________.
By: VanderWal
http://www.russianflora.com/store/images/product/custom_green_plant_35.jpg
The main energy
absorbing molecule
in green plants is
CHLOROPHYLL
___________________
CAROTENOIDS
_________________
are pigments too.
(These look yellow,
orange, and red)
http://www.rnzih.org.nz/images/gardenimages/carrots_d.jpg
HIDDEN
Carotenoids are usually _______
chlorophyll
by the presence of _______________
http://www.litzsinger.org/weblog/archives/email%20AutumnTrees5%20LREC%20102605.jpg
When chlorophyll
FALL
DISAPPEARS
____________
in the _______,
we can see the carotenoid colors that
ALL THE TIME
are there ____________,
but are no
longer hidden.
http://sps.k12.ar.us/massengale/ecology_notes_bi.htm