I don’t know. I assume it has to do with the different chemicals in the fruit. It would be best to ask one of the scientists in the Food Zone about that one.
Don’t know – but yes, there will be a molecule in there that absorbs light of a certain wavelength that means that the light that bounces off back into your eye looks yellow. Don’t know what molecule that is, but I bet somebody does. If you ground up the pineapple and separated out the molecules (done any chromatography?) you might be able to separate all the molecules out and get some of the yellow one.
I do not know the specifics of this. In general, most plants and fruits have molecules that are either coloured, or can undergo chemical change to form coloured substances. A freshly cut pineapple is not very yellow. A freshly cut apple is almost white. When the flesh is exposed to air, enzymes in the fruit help the oxygen in the air to cause chemical change to make the pineapple more yellow, or the apple to brown. If you dip the cut fruit in salt water, this slows the colouring process.
I don’t know the exact reason why a pineapple is yellow. It will be because like Matt said that there will be a chemical in the pineapple that absorbs particular wavelengths of light and reflect yellow light towards our eyes. There could also be more than one chemical responsible for this.
Did you know that not all pineapples are yellow? There are red pineapples and some of them are grown in Queensland.
Hi pineapple. You are yellow because you use the sun’s light to perform photosynthesis, producing sugars. You use these sugars like we use our food, to make things that we need to survive. You make these sugars into chemicals called carotenes, which give colours ranging from yellow to red. The chemicals appear to be these colours because of wavelengths and absorption as the other scientists have explained.
If you were a person you would be person coloured. This is because people have melanin in their skin, a chemical produced by cells called melanocytes. The colour of your skin depends on how much melanin you produce; more melanin = darker skin.
Melanin absorbs UV radiation, and when we spend too long in the sun, doing that terrible thing called ‘tanning’, more melanin is produced. This is because the body knows that the sunlight is doing damage to your cells so it is trying to protect itself. The melanin can’t absorb all the UV though so too much sunlight = high chance of skin cancer.
I don’t know. I assume it has to do with the different chemicals in the fruit. It would be best to ask one of the scientists in the Food Zone about that one.
0
Don’t know – but yes, there will be a molecule in there that absorbs light of a certain wavelength that means that the light that bounces off back into your eye looks yellow. Don’t know what molecule that is, but I bet somebody does. If you ground up the pineapple and separated out the molecules (done any chromatography?) you might be able to separate all the molecules out and get some of the yellow one.
0
I do not know the specifics of this. In general, most plants and fruits have molecules that are either coloured, or can undergo chemical change to form coloured substances. A freshly cut pineapple is not very yellow. A freshly cut apple is almost white. When the flesh is exposed to air, enzymes in the fruit help the oxygen in the air to cause chemical change to make the pineapple more yellow, or the apple to brown. If you dip the cut fruit in salt water, this slows the colouring process.
0
I don’t know the exact reason why a pineapple is yellow. It will be because like Matt said that there will be a chemical in the pineapple that absorbs particular wavelengths of light and reflect yellow light towards our eyes. There could also be more than one chemical responsible for this.
Did you know that not all pineapples are yellow? There are red pineapples and some of them are grown in Queensland.
0
Hi pineapple. You are yellow because you use the sun’s light to perform photosynthesis, producing sugars. You use these sugars like we use our food, to make things that we need to survive. You make these sugars into chemicals called carotenes, which give colours ranging from yellow to red. The chemicals appear to be these colours because of wavelengths and absorption as the other scientists have explained.
If you were a person you would be person coloured. This is because people have melanin in their skin, a chemical produced by cells called melanocytes. The colour of your skin depends on how much melanin you produce; more melanin = darker skin.
Melanin absorbs UV radiation, and when we spend too long in the sun, doing that terrible thing called ‘tanning’, more melanin is produced. This is because the body knows that the sunlight is doing damage to your cells so it is trying to protect itself. The melanin can’t absorb all the UV though so too much sunlight = high chance of skin cancer.
0