2006-06-30 02:24:50 · 5 answers · asked by shreyas 1 in Science & Mathematics ➔ Physics
Ignore the above answers they are all horribly wrong. This is a chemistry question.
Colors in chemistry are due to two main phenomena.
1. Light Absorption
2. Charge Transfer
For the first case an electron can be promoted to a higher energy state by absorbing light energy. White light consists of wavelengths (about) 400-800 nanometers. Wavelength is inversly related to frequency which is related to the energy of light. The photonic energy of the light from certain wavelengths is absorbed to promote an electron. The rest of the light is transmitted. This transmitted light is what we see. But also keep in mind that the eye works strangely and we see mixed colors a little different.. I dont know why but just keep it in mind.
The second phenomena is charge transfer. This occurs when an electron is transferred from one atom to to another. An example is KMnO4 (which has no d electrons) but is purple! This is because a electron is transferred from the oxygen to the manganese.
And there are some other mechanisms for which colors are produced. One of the latest is now understood by a physics professor at ucla. Hes been studying how sound can interact with a bubble to produce light.
2006-06-30 05:32:55 · answer #1 · answered by Richardicus 3 · 1⤊ 0⤋
They are coloured just to show the ions of 2 different substance
2006-06-30 10:05:52 · answer #2 · answered by sumit_ag42 1 · 0⤊ 0⤋
Only the ions of transisonal element are gives colours for their partly filed d-cell.
2006-06-30 10:42:27 · answer #3 · answered by Sayom 2 · 0⤊ 0⤋
Hydrogen charged
2006-06-30 09:27:54 · answer #4 · answered by Kennedy 2 · 0⤊ 0⤋
change in the ph balance.
2006-06-30 09:29:18 · answer #5 · answered by Yisrael Chai 3 · 0⤊ 0⤋