Why is water clear in a glass but appears blue in a white bath?

The reason in a glass it appears clear and in a larger scale such as the sea (or perhaps the bath, though Ive never seen it blue in the bath...perhaps your bath water is full of dissolved impurities like Cu2+, lol) is because water defragments light. What happens is as light travels through water, the water ';bends'; the light. In actuality, it slow it down so that the angle of the light hitting the water is altered by the time it departs from it. Colour is where light has different wavelengths, such as the colour red has a wavelength of 700nm (nanometre) and violet has a wavelength of 400nm. When light hits objects, they absorb all wavelengths of light except that of the colour we see. Therefore if we look at a brown table, the table reflects only brown light and absorbs all other colours (wavelengths) of light. In a similar way, water absorbs all frequencies of light except a certain frequency of blue. The frequency of blue is 450鈥?95 nm, through ranging between 450鈥?95 nm, we get different shades of blue, for example royal blue, turquoise etc. Water absorbs a large amount number of frequencies, including red, and so only a very small frequency of light is reflected from the water. Therefore in order for our eyes to be able to perceive the blue colour of the water, we need a large amount. Therefore the more water there is, the more blue it will appear, like the sea is deep blue (large amount of water therefore more blue light on the specific frequency to be captured by the eye), streams are light blue (small amount of water therefore less blue light on the specific frequency to be captured by the eye).





Therefore in conclusion:





All water is blue, but per mole (molecule) only a small amount of blue light is detected by our eyes, and so by increasing the amount of water, increases the amount of blue light reflected and so it appears more blue with more water.





HOPE THIS HELPED! :DWhy is water clear in a glass but appears blue in a white bath?
Your more than welcome, well some people on here as very stupid questions with a lack of common sense so perhaps the people who commented just asumed you were one of these people. Glad i helped you! :D

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Why is water clear in a glass but appears blue in a white bath?
It should not appear blue in a bath unless you've put blue bubble bath in! Are the wall, ceiling or curtains in the bathroom blue? It sounds more like blue light being reflected!
Maybe you just did not notice your mum putting in the blue bath salts
very good question
If your glass had the size of a bath, it would appear slightly blue as well. If your glass had the size of an ocean it would appear deep blue.





The longer distance light has to travel in (clean) water, the more blue the water will appear. This is because of the reflexion of light passing through the water molecules.





For the same reason, the sky is blue as well (which is then reflected into the water of the see adding to the blue impression)





Seas and oceans may have other colors like green, brown and even red, this is caused by algae, mud or sand and, unfortunately, pollution.
are u watching cartoons?
water actually has a very very light blue colour


and it is only in large quantities that u can actually see a bluish tint
the official colour of water is blue.it appears clear in a glass due to the fact that there is not enough to produce a blue colour.in the bath the is just enough (depending how much you put in it)to produce a pale blue.


this is caused by light passing thru the water particles the more particles the darker the blue
The water in my bath doesnt appear blue.
Water is a strong absorber of infrared radiation, and this property of absorption also somewhat affects visible red light. Because white light that passes through water has some of it's red part taken away, the light takes on a bluish tint.
water dose not have acolor but appers to be green in pool becouse of the algie or other plants and appears to be blue in oceans or very lagre amount of water container like sea when u look from a far and it is becouse of the nitrogen that hav the bluish color and it is about 70% in the atmosphere so u do not actually see color of water but color of nitrogen also oxygen have a little bluish color and O3 which is made from oxygen the ozone is also bluish color and O2 the oxygen like I already siad is blue
Yes it does seem blue, but I have never thought about it...i dont know
Pure water would be clear. Tap water takes on tints in larger volumes because the tint is so light you can't see it in a small volume like a glass, you need a bigger sample of water like a tub.
Strange. On my vacation in Schotland some time ago, water appeared to be pretty brown over there, where I was...