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What is the velocity at which a mooving observer can see the red light as green Doppler?
Wiki User
∙ 15y ago
Observer would have to move toward the light source at about 1/5 the speed of light. A little over 37,000 miles/sec.
Wiki User
∙ 15y ago
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f
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Why did plants choose to be green?
plants are green because they absorb all light wavelengths other than green light. The green light bounces off the surface instead, and into an observer's eyes, causing them to see the plant as being green. Not all leaves are green, and some plants, like Japanese Maples, get the same amount of energy from sunlight as a plant with green leaves. This causes me to think that the fact that leaves are green is sort of arbitrary. The color of the leaves in fact has nothing to do with photosynthesis (as someone who answered this question previously suggested), which is merely the process by which energy absorbed from sunlight is used to convert carbon dioxide into sugars. energy is stored in the bonds of these sugars.
