Which wavelengths of light do plants like? Why? THANKYOU!?
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By using a spectrophotometer, scientists found that a green leaf absorbes mostly the blue and red portions of the spectrum, and reflects or rejects the green wavelengths. Therefore, green light is the worst, or most useless light, to give a green plant.\nThese reflected green wavelengths strike your eyes, and you see green.
672889
>>>why most common chlorophyl on most leaves is the the\n>>> green one? not the red one, or other color instead...\n\nChlorophyll only comes in one colour: green. There are red and yellow accessory pigments, but they are not chlorophyll and serve only to transfer energy to chlorophyll. The chlorophyll is still required to use those accessory pigments.\n\nAs for why chlorophyll predominates, it is simply because chlorophyll blue light, and red wavelengths are the most common wavelength in sunlight. Or to put it another way, chlorophyll has evolved to absorb that part of the sunlight where the most energy is.\n\nIf leaves were any colour but green they would be wasting most of the energy in sunlight.
251507
I'm not really sure what you're asking for, but I'd answer this question using Physics concepts.\n\nOK, we all know that the visible light spectrum lies between the wavelength of 700nm-400nm. (That's 700 nanometer-400nanometer). 700nm is the red part of the spectrum, and 400nm is the violet part of the spectrum.\n\nAccording to your colour spectrum (ROYGBIV), orange light has a larger wavelength than yellow light.
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Bees can see UV rays. UV rays are part of the electromagnetic spectrum and has a bit shorter wavelength than the light we see.  It is this type of energy that gives us a sunburn.  Most flowers are very colourful although sometimes they are a plain white to us.  To a bee though, because they can see UV rays, which reflect more light, the flower to them looks very colourful.
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Try illuminating a growing plant (¿beans?) with different wavelengths (a simple set of filters -yellow, red and blue- will do) in black boxes. \nMeasure the length of the shoots under different light colors with time. \nWhat you should see: Blue should give the highest growth rate, due to the fact that the maximum absorption of the plants pigments falls on those wavelengths.
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1. Why the sky is blue.\nWhen light passes through a medium with molecules much smaller than the wavelength, it is scattered. You can understand it so: the light begins by going as a beam "forward". It gets absorbed for a moment by a molecule and then emitted again in whatever direction. This effect is more effective when the wavelength is shorter. Blue light has a wavelength ~2 times shorter than red light and gets scattered 16 times as effectively. So the beam coming directly from the sun is deprived of blue =>thus it is yellow (or red if it is sunset and it has passed a thick layer of atmosphere (geometry)). From all other directions we see the light that was going towards other points on the Earth. The yellows and reds went on and the blue was sent in other directions, including towards us.\n\n2. Why the grass is green.\nGreen plants use light to make food. The light is absorbed by chlorophyll (two types of it, too and a bit different, but no matter). Chlorophyll absorbs violet, blue, orange and red light. What we see is what was not absorbed, but reflected. If you take the aforementioned colours out of the white light spectrum, you get a mixtureof green and yellow. And green is the colour our eyes see best. Thus - green grass.\n\nI hope I've been clear
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Everything in the known Universe is energy, the mysterious power that holds atoms together, makes trees grow, keeps your heart beating and the Earth spinning through space. This energy vibrates at different speeds, or wavelengths. Matter may be understood to be very slow-moving energy relative to, say, sunlight. We can use the electromagnetic spectrum, a chart of all the types of energy science has measured, to better understand this concept. X-rays, radio waves, microwaves, and television transmissions are all to be found on the electromagnetic spectrum, as well as visible light, within which we find the seven colors of the rainbow: red, orange, yellow, green, blue, indigo and violet. All of these energy forms have characteristic frequencies at which they vibrate.\n\nIf you tune your radio to a frequency of, say, 102.5, you'll always get the same station. The station sends out its programming at a particular frequency; your receiver transforms the radio waves into audible sound waves. One form of energy is transmuted into another form.\n\nColorology, the science of color, is based on the same principle. Each of the seven colors and their shadings vibrate at a characteristic frequency; anything you can see (visible light) must also be vibrating at one or more of those frequencies. Our physical bodies "tune in to" -- or receive and resonate with in a particular way -- each of the seven colors of the rainbow. Sunlight contains all of those frequencies and more (ultraviolet rays, cosmic rays, etc.)\n\nHow do our bodies "tune in" to these frequencies? We all have seven major endocrine glands in our bodies, which regulate the functioning of bodily systems (circulation, reproduction, respiration and so forth) by secreting complex chemicals called hormones. Hormones act to stimulate or depress bodily activities as necessary to maintain a state of dynamic balance that we experience as "good health." As a result of excessive or insufficient amounts of hormones, physical, mental and/or emotional imbalance (dis-ease) can occur.\n\nEach of these seven endocrine glands, being a visible energy form, is vibrating at the frequency of one of the colors of the rainbow. We can, therefore, by various methods expose our bodies to these colors and literally, physically affect the vibratory rate of the endocrine glands, which in turn affects the rate of hormone secretion, and thus the functioning of the organs. This holds true for the brain as well; therefore, emotional and mental states are also influenced.\n\nChildren, the elderly, anyone in poor health, and current or recovering substance abusers (all of whom may be in a state of energy imbalance) are usually overly sensitive to the effects of color; its use should, therefore, be carefully monitored with these groups.\n\nUsing Color Practically\nIt's usually best to start by balancing the body using all the colors; then, once you know what system (color) is out of balance, you can work more extensively on that particular area, either stimulating the energy with that system's color, or by suppressing the energy with the complementary color. When balancing the body, always start at the base of the spine (red, the "root" chakra or energy center) and work your way up the torso to the top of the head (violet, the "crown" chakra). The body more easily adjusts and accepts the energy if the frequencies progress from longer to shorter wavelengths ("slower to faster").\n\nThere are a number of simple, inexpensive and effective ways to intentionally employ color:\n\nVisualization -- Simply imagine a ray of light of the desired color penetrating and bathing the dis-eased area. Researchers have found that thoughts have a tangible effect on the physical body, measurable by EEG machines and other methods.\n\nSolarized water -- Place a clear, glass bottle filled with distilled or purified water and covered with colored cellophane in direct m
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The sky appears blue to us on a clear day, because the atoms of nitrogen and oxygen in the atmosphere separate the suns white light into its many colours, and scatter them throughout the atmosphere.The wavelength of the blue light scatters better than the rest, predominates over the other colours in the light spectrum, and makes the sky appear blue to us.The scientific name for this phenomenon is the Tyndall effect, more commonly known as Rayleigh scattering.\n\nThis phenomenon describes the way in which light physically scatters when it passes through particles in the earths atmosphere that are 1/10th in diameter of the color of the light. The light spectrum ranges in wavelength from red to violet, and, since the wavelength of the blue light passes through the particles with greater ease than the wavelengths of the other colors of light, the sky appear blue to the naked eye.\n\nThe human eye has three types of light receptors, known as cones, located in the retina. The cones are either considered to be red, or blue, or green, based upon their strong response to light at these wavelengths. As light stimulates these receptors, our vision translates the signals into the colors we see.\n\nWhen gazing at the sky, the red cones respond to the small amounts of red light scattered, and even less strongly to the orange and yellow wavelengths. Although green cones respond to yellow, their response to scattered green and green-blue wavelengths is stronger. Finally, colors near the strongly scattered blue wavelengths stimulate the blue receptors.\n\nIn short, the skylight stimulates the red and green cones almost equally, while stimulating the blue cones more strongly. For these reasons, our vision naturally adjusts as clearly as possible to separate colors.
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Well, since the only planet that we known absolutely, positively has green vegetation is the Earth, then all measurements of the speed of light here in the atmosphere are in the presence of green vegetation.\n\nAs far as any astronomical, deep space observations -- heck, we've only just detected Jovian-class planets in other solar systems.  No known vegetation there!\n\nSo, I'd have to say that the answer to your question is no, we've not made any observations of the type you describe.
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I know that different colors are "visible" at different wavelengths.  So, depending on an increase/decrease in energy, you would be at varying wavelengths?
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Someone else said the colors of the visible light spectrum. This is correct. That is an acronym used to help remember the order of the light wavelengths.\n\nThe longer wavelengths on the left (Starting w/ R.)w/ red being the longest and as you move toward the right the wavelengths are shorter w/ violet being the shortest.\n\n-------Red Orange Yellow Green Blue Indigo Violet-------\nLongest<--------->Shortest\n\nThe visible light spectrum is part of the electromagnetic spectrum. It makes up a small portion of the different wavelengths.\n\nOn the shorter wavelength end you have Ultraviolet radiation, x-rays, & gamma rays. With the longer wavelengths you have infrared, microwaves, & radio waves.\n\nThe shorter wavelength, the greater amount of energy it contains & the more potentially dangerous it is.\n\nSee EM Spectrum diagram using the link below.
210981
I would immediately say sunlight, but this would really depend on the conditions. Sunlight is more intense and therefore contains more energy than artificial light, however artificial light could be on all the time. This basically has to do with the amount of light/energy a plant can absorb/convert into plant in a space of time. I would still go with sunlight, more environmentally friendly :)
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The energy of a photon is given by E = h*f where h is planck's constant and f is the frequency.  Since photons travel at the speed of light, c, the wavelength is just:\nlambda = c / f.\n\nThe spectrum of light goes from red to violet, where red has the lowest frequency (longest wavelength) and violet has the highest frequency (shortest wavelength).  This means that violet light has more energy per photon than red light.\n\nIn radiation heat transfer, a black body is an object that absorbs all incoming radiation and reflects none (stars are nearly black).  Also, a black body emits a spectrum of radiation based on its temperature.  A plot of monochromatic emissive power vs. wavelength shows the relative "concentration" of different wavelengths of radiation in the total output.  This plot has a characteristic shape given by Planck's Law of blackbody radiation, and it has a maximum at:\n\nlambda_max * T = 2898 micrometers * K = constant\n\nwhere T is the temperature in Kelvin\n\nThus lambda_max is inversely proportional to Temperature.  This means, as the temperature of the emitting body increases, the wavelength at which more of the energy is radiated at decreases (the frequency increases).\n\nI wish I could show you the loglog plot of monochromatic emissive power vs wavelength in Mills page 453.  It shows how low temperature bodies emit in the infrared and negligibly in the visible range and as the temperature increases, the maximum moves toward the visible range.  The sun, at 5800 K has a nice plateau maximum in the visible range which explains why being able to see light is so useful for us.  Another cool thing to see in the plot is that the curve is steeper on the low wavelength side than it is on the high wavelength side: this means that as you increase the temperature of an object, it will glow red and then white because anything hot enough to have its maximum in the violet range also has a large emissive power for everything colder than violet, so all colors of light will be present.\n\nSince a hotter body radiates at higher frequencies, in a sense violet light is "hotter" than red light.\n\nTake a look at the book (or another heat transfer engineering text).  I can't explain very well with only text.
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A typical human eye will respond to wavelengths between 400 and 700 nm.  Some may be able to perceive from 380 to 780 nm.
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it has to do with wavelength of the light.  the reason why plants are green is because they don't absorb the green light, green litht has a shorter wavelenght.  on the other hand If the object absorbs  blue, green and yellow light it will appear red  so I guess it does have to do with the material\nhope it helps
1019106
Sorry folks but several of you are wrong.  Blue light has a shorter wavelength than other light, hence it is more energetic.  All other wavelengths get absorbed as one descends into the depths of the ocean.  Finally the only light illuminating ones surroundings is blue!
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The visible light region is from 0.7 µm to 0.4µm of the spectrum. The color of an object that we see is the color or wavelength of light reflected from the visible spectrum. All other colors or wavelength are absorbed. the following chemicals are different in terms of wavelength because of their different nature's regarding reflection of particular wavelength or the absorption of other.