Box of 10 torches including batteries. Teach the basic principles of light absorption, reflection and refraction.
Make a blue sky in a jar
Demonstrate to students why the sky is blue using these torches (to act as the sun), a clean glass jar, water, milk and a very dark room.
Turn on the torch, make sure the room is dark, then shine the torch at the jar of liquid, holding the torch to one side of the jar and look at the colour of the liquid from the front.
It appears blue when we shine the light from the bottom because the blue light is scattered the most as it travels up the container.
We can make this liquid change colour, and investigate red and pink sunsets, by moving the torch and changing the position of the beam of light. In the same way, the sky appears a different colour depending on the position of the sun.
It is often said that the most beautiful sunsets occur over polluted cities and after volcanic eruptions when there is a lot of smoke and ash in the air. We can see this intensity of colour change when we add more milk to the mixture.
"Fantastic set of torches which are easy for kids to use. Bright colourful and good size for kids to hold. Handy box to house them. And great value with batteries included. Kids love using them to explore light. "
(Posted on 28/05/2017)
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