Transcript Pigment and Light Notes

DO YOU SEE THE
LIGHT???
Based on the visible light spectrum below, which part of the
spectrum has the longest wavelength:
1. Red light
2. Yellow light
3. Violet light
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Based on the visible light spectrum below, which color of
the spectrum has the most energy:
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1. Red light
2. Yellow light
3. Violet light
If you were diving on a reef, as you begin to
descend into the depths of the ocean, which part
of the visible light spectrum will be “lost” first
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Reds
Orange
Blue
Green
Violet
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WHY RED????
BACK TO
THE
NOTES
Based on the graph below, what
color is this object:
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Red
Orange
Yellow
Blue
Violet
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Based on the graph below, what
color is this object:
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2.
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Red and blue/green
Orange and yellow
Yellow and blue
Blue and violet
If this demonstrates the absorption
spectrum for your new shirt, how would
you describe your new shirt ??
ONE UGLY SHIRT!!
LET’S SEE
HOW THE
LAB
WORKED
Why did some molecules move up the
paper really far while others remained close
to the bottom of the paper??
CHLOROPHYLL B= Large molecule with two polar side groups.
Will move the slowest. This is army green in color.
CHLOROPHYLL A= Also a large polar molecule with one polar side group.
This will move the second slowest. This is a blue/green
color.
XANTHOPHYLL= It’s yellow
BETA CAROTENE= Small molecule with no polar side groups.
This is able to move up the paper the fastest.
It’s orange.
DID YOUR RESULTS LOOK LIKE THIS???
Carotene
Xanthophyll
Chlorophyll A
Chlorophyll B
These
chromatograms
show chlorophyll
b at the bottom,
followed by
chlorophyll a,
xanthophylls, and
carotenes.
Carotenes
Xanthophylls
Chlorophyll a
Chlorophyll b
These represent the pigments that are
found in the spinach leaves.
What function do these pigments serve
in plants???
Why does spinach have more than
just one pigment?
Would a plant lacking pigment
(white) be able to survive? WHY?
Below is the absorption spectrum for the
spinach. Discuss with your partner the
most useful/absorbed part of the visible
light spectrum and the least
useful/absorbed part of the spectrum.
Based on the graph, what color is
this plant:
1. Green
2. Red
3. Violet
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Based on the graph, what colors
are best absorbed by this plant:
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Green and orange
Red and violets
Violet and green
Green and reds
Plants need to be able to absorb light for
the process of photosynthesis. The
pigments in the plant are like buckets used
to capture/collect this solar energy.
Look at the two graphs below. One shows the
absorption spectrum for the spinach leaves. The
other shows the rate of photosynthesis. Do you
see a relationship between the two graphs??
Rate of Photosynthesis
Let’s combine both graphs!
Where is the rate of photosynthesis the
highest???
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Based on the graph below, which color light
is best absorbed by plants for
photosynthesis
1. Red
2. Yellow
3. Green
4. Orange
5. Violet
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Based on the graph below, which color light
is least absorbed by plants for
photosynthesis
1. Red
2. Yellow
3. Green
4. Orange
5. Violet
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NOW DO YOU SEE
THE LIGHT???