DO YOU SEE THE LIGHT???

Based on the visible light spectrum below, which part of the spectrum has the longest wavelength:

0%

0%

0% 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:

0%

0%

0% 1. Red light

2. Yellow light

3. Violet light

WHY RED????

BACK TO THE

NOTES

Based on the graph below, what color is this object:

0%

0%

0%

0%

0% 1. Red

2. Orange

3. Yellow

4. Blue

5. Violet

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Based on the graph below, what color is this object:

0%

0%

0%

0% 1. Red and blue/green

2. Orange and yellow

3. Yellow and blue

4. Blue and violet

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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.

Chlorophyll b

Chlorophyll B

Chlorophyll A

Xanthophyll

Carotene

DID YOUR RESULTS LOOK LIKE THIS???

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.

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.

Based on the graph, what colors are best absorbed by this plant:

0%

7%

79%

14% 1. Green and orange

2. Red and violets

3. Violet and green

4. Green and reds

Based on the graph, what color is this plant:

0%

0%

100% 1. Green

2. Red

3. Violet

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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???

Based on the graph below, which color light is best absorbed by plants for

photosynthesis

43%

0%

14%

7%

36% 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

0%

0%

93%

0%

7% 1. Red

2. Yellow

3. Green

4. Orange

5. Violet

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NOW DO YOU SEE THE LIGHT???