How to Create a Rainbow at Home Using Simple Resources

You will need the following materials:

• four different colors of food coloring (e.g. red, yellow, green, blue)
• five tall glasses or clear plastic cups
• ¾ cup (180 gm) of granulated sugar
• a teaspoon for measuring
• one cup (240 ml) water

In one glass add three teaspoons (about 15gm) of sugar. In the second glass add six teaspoons of sugar (about 30gm), nine teaspoons in the third glass (about 45gm) and 12 teaspoons of sugar the fourth glass (about 60gm). Add nine teaspoons (about 45ml) of water to each glass and keep stirring until the sugar is completely dissolved. Add three more teaspoons of water if the sugar is not dissolved completely. Add two to three drops of red, yellow, green and blue food colourings to the first, second, third and the fourth glasses respectively.

The fifth glass is to be used for creating our rainbow. Fill the fifth glass with one fourth of the blue sugar solution. Carefully add the green solution next. Do this by putting a spoon in the glass, just above the level of the blue solution. Using the spoon fill the glass with green solution until the glass is half full. Add the yellow and the red solutions in similar manner.What do you notice?

The density of the liquids or the solutions are affected by the amount of sugar dissolved. The blue solution is the densest since it has the maximum sugar dissolved in it. The other solutions float on top of the blue solution since they are less denser when compared to the blue solution. The solutions are miscible and the densities should be very close, so you will be able to see the layers not forming well defined boundaries. If carefully done, the colours should relatively be staying seperate from one another. Stir up the liquids and VOILA!!! what do you find ???? A cute little rainbow inside a glass in your home.