Creation of a rainbow in a glass

Activity No # 1 - CREATION OF A RAINBOW IN A GLASS

Shared BY :
S​yeda Sabah Noor​
M.O.GIRLS HIGH SCHOOL
Number 4​3​,DICKENSON ROAD
BANGALORE:-4​2​

Estimated Time

16 Min

Materials/ Resources needed

1. 5 Glass Beakers
2. 4 Food Colours ( Red, Yellow, Green , Blue) Optional -(Ujjala for Blue)
3. Sugar
4. Water
5. spoons
6. Spirit Lamp
7. Tripod Stand

Multimedia resources

Process (How to do the activity)

STEP 1: Add 1 tablespoon of sugar to the first glass, 2 tablespoons of sugar to the second glass, 3 tablespoons of sugar to the third glass, 4 tablespoons of sugar to the fourth glass. Keep the fifth glass empty.
STEP 2:- Add 2 tablespoons of water to each of the first 4 glasses. Stir each solution and heat it till sugar dissolves.
STEP 3:- Add 2-3 drops of red food coloring to the first glass, Add yellow food coloring to the second glass, green food coloring to the third glass, and blue food coloring to the fourth glass. Stir each solution.
STEP 4:- Fill the last glass about one-fourth full of the blue sugar solution. Carefully layer some green sugar solution above the blue liquid. Do this by inverting a spoon in the glass Similarly add the Yellow layer and finish it with the red solution.

DISCUSSION:- You can use the rainbow project as a decoration or to teach principles of density, concentration, refraction, dispersion etc.

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Developmental Questions (What discussion questions)

1. What is a rainbow?
2. When do you see a rainbow ?

Evaluation (Questions for assessment of the child)

1. What is Reflection ?
2. How is a rainbow formed ?

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