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Question

Why is that when Pepsi is poured in a small amount, it is in dark brown color and when it is a large amount , it is in black color ?
Does it has something to do with chemical properties?

Answer 1

The nature of a molecule means that its properties are the same regardless of whether you have a small quantity or a large quantity. Therefore, it has nothing to do with chemical properties changing. The reason the color changes is that less light is able to get through more Pepsi. Therefore, it appears darker.

Answer 2

No, it does not have to do with chemical properties, but physical property. The Pepsi absorbs light, and the larger the volume of liquid you look through, the more light is absorbed. In thin layers you can distinguish between the different amounts of absorption at different wavelengths, so the liquid looks colored. However, the liquid absorbs some light at all wavelengths, and if the layer through which you look is thick enough, it will absorb almost all light at all wavelengths, and therefore look black.

Answer 3

Well it's very simple, really. In a small amount, there is less volume, so that means light has to pass through less Pepsi. When the volume is larger, light has to pass through more of it, and it appears opaque. It is the same with light passing through seawater. You can see fairly well near the surface, but as you go deeper, it becomes harder to see.