And what about reflection?color of object all depends on reflection,so water reflects..?DrClaude said:This is the worse explanation I have ever seen. Water is colourless because it let's visible light pass through, without absorbing much.
http://en.wikipedia.org/wiki/Electr.../File:Absorption_spectrum_of_liquid_water.png
Water is transparent.gracy said:And what about reflection?color of object all depends on reflection,so water reflects..?
DrClaude said:This is the worse explanation I have ever seen. Water is colourless because it let's visible light pass through, without absorbing much.
In case of water, almost all the colours are absorbed. No colour is reflected back, thus no colour reaches our eyes. That is how water appears to be without any colour.
Ok can you please tell me if white color reflects infrared light also?davenn said:Exactly !
its is noted that purified (distilled) water will have a slight blue tint to it
that last statement on the linked page is just so wrong ...if all the colours were absorbed then yes, it would be black
Dave
So the object which is reflecting most nearly all of the wavelength of visible spectrum (i.e white color object)will reflect infrared light also.right?davenn said:IT does to a better degree than say black
feel the difference in temperature between a white and a black painted car that is in the sun
First, infrared is a big part of the electromagnetic spectrum, so there is not a single thing as infrared light. As davenn said, in general withe things will also show greater reflection of IR radiation, especially in the near IR. But you could, at least in principle, have a material that is white but still absorbs all IR radiation.gracy said:Ok can you please tell me if white color reflects infrared light also?
But white color object would reflect IR better than any other colored object say red or blue,is it right?DrClaude said:First, infrared is a big part of the electromagnetic spectrum, so there is not a single thing as infrared light. As davenn said, in general withe things will also show greater reflection of IR radiation, especially in the near IR. But you could, at least in principle, have a material that is white but still absorbs all IR radiation.
davenn said:IT does to a better degree than say black
feel the difference in temperature between a white and a black painted car that is in the sun
If its blue, probably, but if it is red, absolutely not! It is already reflecting in the red part of the spectrum, so it is probably also reflecting in the near IR.gracy said:But white color object would reflect IR better than any other colored object say red or blue,is it right?
Orodruin said:You cannot draw a conclusion about the IR properties solely based on this,
DrClaude said:First, infrared is a big part of the electromagnetic spectrum, so there is not a single thing as infrared light. As davenn said, in general withe things will also show greater reflection of IR radiation, especially in the near IR. But you could, at least in principle, have a material that is white but still absorbs all IR radiation.
Okyou mean red color object reflects red color better than white color .Thanks for great explanation.Can you please look at this link .http://io9.com/5903956/the-physics-that-explain-why-you-should-wear-black-this-summer.DrClaude said:If its blue, probably, but if it is red, absolutely not! It is already reflecting in the red part of the spectrum, so it is probably also reflecting in the near IR.
davenn said:True and I didn't :)
DrClaude expanded on the theme well :)
If it is hot out where is your body heat going to be relative to the air around you? On a comfortable spring day perhaps black might keep you cooler...gracy said:
Bedouins wear black in the desert, and there is a reason:jerromyjon said:If it is hot out where is your body heat going to be relative to the air around you? On a comfortable spring day perhaps black might keep you cooler...
No, this is not true. White is reflecting all colours, including red.gracy said:Okyou mean red color object reflects red color better than white color .
Water is colorless because it has a relatively simple molecular structure with two hydrogen atoms bonded to one oxygen atom. This structure does not allow for the absorption or reflection of visible light, which is what gives objects their color.
The molecular structure of water, with its symmetrical arrangement of atoms, does not have any specific vibrational frequencies that correspond to visible light wavelengths. This means that water does not absorb or reflect any specific color, resulting in its colorless appearance.
In its pure form, water is always colorless. However, impurities and contaminants can give water a slight color. For example, water with high levels of iron may appear slightly yellow or brown, and water with algae blooms may have a green tint.
In terms of color, there is no difference between tap water and bottled water. Both are colorless in their pure form. However, bottled water may have added minerals or chemicals that can give it a slight color, but this is not always the case.
The color of a liquid depends on its molecular structure and the presence of certain compounds or impurities. Some liquids, like fruit juices, contain pigments that give them their color. Water, on the other hand, has a simple molecular structure that does not allow for the absorption or reflection of visible light, resulting in its colorless appearance.