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EVA
RUDLINGER |
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contact: evarue@btinternet.com |
| Light
intensity watts per square metre 1000 clear sunlight at noon in June, 100 000 lux light saturation for photosynthesis in wheat 20 000 lux 100 daylight, overcast sky, 1000-10 000 lux 10 compensation point of photosynthesis [photosynthesis and respiration equal], 100-1000 lux 1 photoperiodic control of flowering, ca 100 lux 0.1 late twilight, stimulation of seed germination [8 minutes of red light] 0.01 moonlight, max. 0.2 lux 0.001 human colour vision, photoaxis in flagellates 0.0001 chlorophyll formation [perceptible greening, red light] 0.00001 phototropism in oat seedling [blue light] straightening of tip of bean seedling [red light] 0.000001 phototropism in fungus [20 minutes of blue light] 0.0000001 black and white image perception in man [the intensity value refers to the illumination of the object] 0.00000001 -- 0.000000001 light from a bright star [Sirius] 0.0000000001 effect on plant growth [inhibition of growth in lower part of stem of oats seedling, red light] 0.00000000001 -- 0.000000000001 light from a star of the 6th magnitude, barely visible by the unaided eye 0.0000000000001 - 0.00000000000001 - 0.000000000000001 - 0.0000000000000001 - 0.00000000000000001 - 0.000000000000000001 - 0.0000000000000000001 light from the weakest stars that can be recorded with the largest telescopes |