A certain species of bacteria, Halobacterium, has a photosynthetic membrne that is colored purple. Its photosynthetic action spe
ctrum is exactly opposite (complementary) to the action spectrum of green plants and photosynthetic organisms. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?
<em>Action spectrum is the region of light that is utilized for photosynthesis by photosynthetic organisms. </em>
According to several research, the rate of photosynthesis in green plants is highest in red region of light, followed by blue region.
<em>If Halobacterium's photosynthetic action spectrum is the opposite of green plants and photosynthetic organisms, it means the rate of photosynthesis in Halobacterium will be highest in blue light, followed by red.</em>
Electromagnetic waves all travel at the speed of light when in vacuum, and essentially this same speed in normal air. Since wave speed is product of frequency and wavelength, c = f λ and λ = c/f = (3.00 x 108 m/s) / (7.5 x 1014 Hz) = 4.00 x 10-7 m = 400 x 10-9 m = 400 nm.
