When a dye is dissolved in water, the water changes color. This is a physical change because the chemical composition of the water does not change. The dye molecules simply disperse throughout the water and absorb some of the light that hits them, which causes the water to appear colored.

Here is a more detailed explanation of what happens when a dye is dissolved in water:

1. The dye molecules are attracted to the water molecules.

2. The dye molecules disperse throughout the water.

3. The dye molecules absorb some of the light that hits them.

4. The light that is not absorbed by the dye molecules is reflected back to our eyes.

5. We see the water as the color of the dye.

The color of the water will depend on the color of the dye. For example, if you add red dye to water, the water will appear red. If you add blue dye to water, the water will appear blue.

The amount of dye that you add to the water will also affect the color of the water. The more dye you add, the darker the color of the water will be.

Dyeing water is a simple and fun way to change the appearance of water. It is a great way to add some color to your next party or event.