Capturing Light Energy

Question 1

Understanding

- Visible light range has a …

Answer 1

• Range of wavelengths

Question 2

Understanding

- Longest/ shortest wavelength

Answer 2

Shortest = Violet (400nm)
Longest = Red (700nm)

Question 3

Understanding

- What colours do chlorophyll absorb most effectively

Answer 3

• Red light

- Blue light

Question 4

Understanding

- What colour does chlorophyll reflect more than other colours

Answer 4

• Green light

Question 5

What colour is sunlight/ what colour is it made up of?

Answer 5

• White light

- Made up of all the colours on visible spectrum

Question 6

What are the colours on visible spectrum

Answer 6

• Red (700nm) - Orange - Yellow - Green - Blue - Indigo - Purple (400nm)

Question 7

Photosynthetic pigments

- Two most important kinds of chlorophyll

Question 7

Photosynthetic pigments

- Two most important kinds of chlorophyll

Answer 7

• Chlorophyll a

- Chlorophyll b

Question 8

• What are other pigments called?

- What do they do/ what lights?

Answer 8

• Carotenoids

- Pick up different wave lengths of light (Green and blue) reflect red and orange

Question 9

What does the absorption spectrum & action spectrum show?

Greatest absorption/ areas of .. light on spectrum/ least in … … range/ most and least efficiently used

Answer 9

• Shows the greatest absorption = violet and blue
• Areas of Red on light spectrum
• Least in yellow and green range
• Most efficiently used = Violet, Blue, Red

Question 10

Advantages for plants to have access to pigments

Answer 10

• Pigments can absorb light on wave lengths that chlorophyll can’t
• The energy they absorb can be transferred to the chlorophyll