Cell Energetics
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16 Terms
Electromagnetic spectrum
The range of all possible frequencies (wavelengths) of electromagnetic radiation
Visible light range
Approximately 400-700 nanometers
Sun's peak emission
The Sun emits its peak power in the visible region of the electromagnetic spectrum
White light
A mixture of all visible wavelengths of light
Red light wavelength
Approximately 700 nm (longest visible wavelength)
Violet light wavelength
Approximately 400 nm (shortest visible wavelength)
Order of visible light colors
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Mnemonic for visible spectrum
Roy G. Biv
Chlorophyll
A green pigment in photosynthetic organisms responsible for light absorption
Function of chlorophyll
Absorbs light energy for photosynthesis
What happens when chlorophyll absorbs light
Electrons are released and used to synthesize ATP
ATP
A form of chemical energy used by cells
Why leaves appear green
Chlorophyll reflects green light more than other wavelengths
Chlorophyll absorption (overall)
Absorbs blue light most strongly, followed by red light
Blue light absorption peak
Approximately 450 nm
Note 
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