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Tyndall Effect: Red Sky at Night
Produced by Solar Spark, this simple activity helps to answer the simple, yet complex question: Why is the sky blue and the sunset red? It's all to do with light scattering and the Tyndall Effect and can be easily demonstrated using a suspension of milk in water.
Milk particles suspended in the water cause any light going through it to scatter. In white light from a torch (or the sun), this scattering separates the blues from the reds and oranges depending on the angle the light is viewed from. This same light scattering occurs in our atmosphere because of particles present in the air. This gives blue sky and red-yellow sunset as the angle of the sun changes throughout the day.
The activity shows:
* properties of light and colour
* waves
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Tyndall effect activity 234.93 KB
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Tyndall effect activity 234.93 KB
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