why does a drop of water  on a polished black tile make it look more darker?
110893
I agree! ‘More darker’. –10 points for grammar.\n\nAs far as the question, it’s all down to refraction and refractive indices.\nYou know snow? You know how it look white from a distance but when you look at it real close it’s made of clear ice? The snow look white because it’s made of lots of tiny ice particles. When light passes through snow it bounces off every which way instead of coming out straight. That bouncing around splits the light into its different colours, just like a prism or a rainbow. And because the light coming from the snow is every different colour it look white. \n\nSame deal with a tile. Putting it simply a tile is made up of lots of tiny clay particles all stuck together. On a fine scale it’s avery rough surface. When light strikes the rough surface it bounces off those clay particles in lots of different directions, producing a white light. White overlaying black produces a grey colour, which is of course not as dark as black.\n\nSo why does water (or polish) make it darker? Because water smooths out the rough edges. It’s like wall papering over all the cracks. Now when light strikes the tile it all bounces off in the one direction. No white light is produces and the tile appears to be black since less white light is emitted.\n\nYou can see the same thing when you wet peice of newpaer, which also goes a darker colour for the same reasons.\n\nYou can see the exact same effect in reverse when you scratch a polished or glazed black tile with steel wool. The scratched area becomes greyish in colour because the rough edges are splitting the light into white again. An application of polish will restore the original colour by making the surface smooth once again.\n\nIn short microscopic rough surface = white light, which makes a black object look grey. Water, polish, glaze etc. are transparent, but they coat the rough edges, thus removing them. No rough edges, no white light, no grey
112441
White paint reflects nearly all of the light that hits it, so because you usually shine white light on it, the paint appears white.\n\nTo test this out, try shining a green light on white paint. What colour will it be? (Green)\n\nBlack paint, on the other hand, absorbs nearly all of the light that is shining on it so nothing bounces back at you.. so it looks black.\n\nWhen you mix the black paint with the white paint, you have some of the mix absorbing the light and some of it reflecting the light. This means that when you shine a white light on the paint it doesn't reflect as much giving the dull white colour we call "gray"
367774
Water is denser than air (or sunlight).
66058
Dunce girl almost has it right.  Due to the surface tension of the coffee, there's a compounding effect of greater surface area at the edge of the menicus AND a disproportionately higher concentration gradient.  Hence when the liquid evaporates, since it contains higher concentration of solids, there will be a darker edge.
522524
The light is reflected
964591
It's an iron oxide and it forms in an oxidising environment. Rich deposits may be the result of weathering, or precipitation out of oxygen-rich surface water or oxygen-rich water in hydrothermal veins.\n\nAs to why it is sometimes red and sometimes metallic-grey I'd say it is probably due to the size of the crystals. When it is ground up fine, it is always red. The smaller grains scatter red light.
468375
Two solutions that you will find in any home, tea and coffee. They should do the job nicely.\nThe longer you leave it in the fluid, the darker it will become, so check it often.
555902
They are water droplets. Huge amount of them will be able to partially block sunlight. So, we see them as being black.
231058
Light hits water droplets and gets divided into seperate colors like the prism effect.
988375
I think it has to do with when lightening hits the surface of the water it dis purses, and weakens!!  The lightening stays on the surface!!  Have a Great Day!  MB
645629
You may need a new monitor due to the splash. Wait and see if it dries out okay.
297899
If you mean how are shadows formed, the answer is simple.  A solid object blocks light.  Since the light can't go through it, then the area all around it has light, but the area right behind it is dark.  \n\nSince light bounces around, it's not completely black inside the shadow.  Some light will still bounce in there and light it up a little, but it won't be as much light as the area around it.  Less light = shadow.
1185766
droplets of water in the air refract light and break it into the visible specturm. thats way you see the different colors.
173536
I believe that the reason for the dark spots is because the sheet that is beneath the ice that makes it look white is damaged, so the ice in that one spot looks dark.
1029694
Each pixel on the screen is composed of three colours (red, green, blue) that each vary in intensity and blend together to give the illusion of one pixel colour due to their small size.\nWhen a drop of water lands on the screen, it magnifies the individual pixel colours such that they appear to be distinct.
29645
It probably is evaporating from the top. The bubbles on bottom are just more visible.
84356
maybe you changed the the color\njust go to tool>internet option\nin general tab \nchoose colors\ncheck the colors\nif Use windows color is uncheked\nchoose it