> Why are leaves green?

Why are leaves green?

Posted at: 2015-05-24 
1. because the primary photosynthetic chemical that evolved can only use red and blue light. If plants had evolved different photosynthetic chemicals, they would probably be different colors.

2. because leaves would overheat, in most climates, if they were that dark. The photosynthetic machinery needs to stay at a certain temperature to work well, and I think that temperature is around 75 degrees.

Chlorophyll gives plants their green colour. There are other pigments in the leaves too, such as xanthophylls (yellows) and carotenoids (yellows, oranges and reds). These pigments are also used in photosynthesis but occur in lesser quantities than the green chlorophyll. The combinations of the different pigments make different shades of green.

Now the reason that plants look green is that they are trying to obtain energy from the sun using a particular part of the light spectrum, mainly the red and infra red wavelengths. If you remember from your physics classes the colour you see is the colour that is reflected from the object, the other colours are absorbed. So in the case of green plants, the green wavelength is reflected and all the other colours, especially reds and blues, are absorbed to drive the energy cycle in the plants.

Chlorophyll does best in the red (around 670 nm) and blue (around 500 nm) areas of the spectrum. That's why many plants have the additional pigments (xanthophylls and carotenoids) called accessory pigments that feed light energy to chlorophyll "a" from light. Chlorophyll is almost useless in the green part of the spectrum, and doesn't absorb that colour. That is why most plants are green.

Plants have have a compound used in photosynthesis which basically helps them to make food and produce energy.

The chlorophyll is green because it absorbs red and blue wavelengths of light ,and so green is not absorbed and is reflected, making the plant look green to your eyes.

Non-transparent things are the color they are because that is the color which is NOT absorbed. The color you see is the color which is reflected due to which we can see it.

due to the chlorophyll in the plant, it absorbs all of the sunlight that reaches it, except for the part of the sunlight that we see as green; that part reflects off of the plant, and enters our eye, via the pupil

when it enters our eye, it is focused by the lense onto the back of the eye (the retina). here it excites electrons and an electrical impulse is sent along the optic nerve to the part of the brain that deals with sight

light is actually electromagnetic radiation. the light from the sun is actually all the colours of the rainbow in one package, called white light. when the white light is refracted (broken up) it breaks into its component parts, ie, red, orange, yellow, green, blue, indigo and violet.

the green part is green due to its wavelength. when the green light enters our eyes it causes vibrations of the same wavelength to occur. it is this vibration that ends up in our brain

Chlorophyll gives plants their green color. The reason for the plant’s green color is that the green wavelength is reflected and all the other colors, especially reds and blues, are absorbed to drive the energy cycle in the plants.

Photosynthesis uses only certain wavelengths of light. The others are reflected back, which makes the leaves look green.

They are gren because of the light. They are really green ...lol that's the natural thing for leaves

when the sun light hits the leaves they absorb ten percent and 90 percent is bounced of because of the color green. I just want to know why aren't they black because black absorbs all light so the leaves would get 100% of light and can use it for photosynthesis.