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2006-12-07 00:09:00 · 9 answers · asked by ANI 2 in Science & Mathematics Physics

9 answers

The electron is a quantum-mechanical particle. As yet, no colour has been attributed to different electrons and it seems they only posses the quantum numbers of charge, parity and spin.

The quark, on the other hand, does posses what is known as 'colour'. This is simply another quantum number, like charge, but it can have six values. These are red, blue, green, antired, antiblue and antigreen. This 'colour charge' is responsible for the strong nuclear force via the gluon. The gluon is unique as far as fundamental bosons go because they exchanges gluons with themselves, meaning that quarks cannot exist on their own.

Quarks make up the structure of protons and neutrons, as well as antiprotons and antineutrons (and a whole host of other baryons). As well as baryons, quarks also make up mesons. The attraction between different quarks operates via their colour and the values of this 'charge' were chosen because their were three different varieties (plus their opposites). So, a red quark, a blue quark and a green quark will be attracted to each other because the sum of the colours equals white (in the same way an electron and a positron are attracted to each other because the sum of their charges is zero). An antired quark and a red quark are also attracted because the sum of the colours is white. Three quarks makes a baryon, two quarks makes a meson.

Interestingly, quarks also have electric charge although this force of attraction (or repulsion) is much weaker (the electro-magnetic force). The electric charge in quarks can take four values: one-third, two-thirds, minus one-third or minus two-thirds.

Quarks also have the quantum numbers for parity, spin and isospin. Ask your physics teacher about these.

PS I am well aware that the 'colour' I refer to is not an actual colour i.e. wavelength of light. It is simply a quantum number. This is exactly what I stated in the second paragraph here. Thank you for pointing out again what I had already said, though.

2006-12-07 00:28:34 · answer #1 · answered by Mawkish 4 · 0 1

In particle physics, the Standard Model theory maintains that while quarks (the components of protons and neutrons) have "colour", the electron, being of a different class of subatomic particles, has no "colour". Here, "colour" is merely a naming convention used to describe a property of the quark: it has absolutely nothing to do with visual colour that humans perceive.

For completeness sake,

The colour of the electron (beam), if you are referring to the venerable cathode-ray tube, is determined by the coating on the inner screen, on which projected electrons hit. The coating is phosphorescent, meaning that it emits visible light when struck by electrons or radiation. In a black-and-white tube, the phosphor glows white when struck. In a colour tube, there are three phosphors arranged as dots or stripes that emit red, green and blue light. The electron itself has a wavelength determined by its mass and its velocity, which in the cathode-ray tube is negligible compared to the speed of light.

2006-12-07 19:08:15 · answer #2 · answered by mr_BIG 3 · 0 0

In molecules, regions of electron density are usually found around the atom, and its bonds. In delocalised or conjugated systems, such as phenol and benzene (and compounds such as haemoglobin and chlorophyll) the electron density covers an entire region, i.e., in benzene they are found above and below the planar ring. This is sometimes shown diagrammatically as a series of alternating single and double bonds. In the case of phenol and benzene, a circle inside a hexagon shows the delocalised nature of the compound. This is shown below:



therefore, electron is colourless

2006-12-08 12:13:49 · answer #3 · answered by Aditya N 2 · 0 0

Colour is a meaningless concept when the particle in question is smaller than the wavelength of the light hitting it.

2006-12-07 00:43:14 · answer #4 · answered by chopchubes 4 · 1 0

nano refers back to the dimensions 10^-9 of a meter (a millimeter is 10^-3). that is all approximately coming up very small machines to do a particular activity. in this scale, you have a tendency to have trouble-free robots whichjust replace the form of a molecule. Its all particularly uninteresting incredibly

2016-12-13 04:28:04 · answer #5 · answered by ? 4 · 0 0

An electron is the negative charge of an atom, and as far as I know they don't have any color.

2006-12-07 00:11:51 · answer #6 · answered by Dita 5 · 1 0

electrons can posess any colour of white light depending upon what energy change they undergo .

2006-12-07 18:43:54 · answer #7 · answered by sumit 1 · 0 0

Just remember the quark "colors" are just names and not real colors. They could have called red, green, blue etc. as north, east, west, etc.

2006-12-07 00:32:34 · answer #8 · answered by Gene 7 · 2 0

colorless. There is no color for sub-atomic particles.

2006-12-07 00:17:21 · answer #9 · answered by areyoustupid3214 5 · 1 1

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