Capturing Light Energy
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Understanding - Visible light range has a …
• Range of wavelengths
Understanding - Longest/ shortest wavelength
Shortest = Violet (400nm) Longest = Red (700nm)
Understanding - What colours do chlorophyll absorb most effectively
• Red light - Blue light
Understanding - What colour does chlorophyll reflect more than other colours
• Green light
What colour is sunlight/ what colour is it made up of?
• White light - Made up of all the colours on visible spectrum
What are the colours on visible spectrum
• Red (700nm) - Orange - Yellow - Green - Blue - Indigo - Purple (400nm)
Photosynthetic pigments - Two most important kinds of chlorophyll
Photosynthetic pigments - Two most important kinds of chlorophyll
• Chlorophyll a - Chlorophyll b
• What are other pigments called? - What do they do/ what lights?
• Carotenoids - Pick up different wave lengths of light (Green and blue) reflect red and orange
What does the absorption spectrum & action spectrum show? Greatest absorption/ areas of .. light on spectrum/ least in … … range/ most and least efficiently used
• 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
Advantages for plants to have access to pigments
• Pigments can absorb light on wave lengths that chlorophyll can’t • The energy they absorb can be transferred to the chlorophyll