1. The Olympic torch… …is lit using no flames. How is it done?
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The Olympic torch…
…is lit using no flames.
How is it done?
© Snapshot Science, 2012
Image: Jon

2. How is the Olympic torch lit?
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How is the Olympic torch lit?
© Snapshot Science, 2012
Image: commons

3. Use it, and the keywords below, to explain how the torch is lit.
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Complete the diagram.
Use it, and the keywords below, to explain how the torch is lit.
Keywords: parabolic mirror, Sun, light rays, reflection, focal point, heat energy
© Snapshot Science, 2012

4. Light rays from the Sun reflect off the parabolic mirror.
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Light rays from the Sun reflect off the parabolic mirror.
Because of the shape of the mirror the rays meet at a focal point.
The light is concentrated at this point. When the torch is placed here there is enough heat energy to cause it to burst into flames.
Keywords: parabolic mirror, Sun, light rays, reflection, focal point, heat energy
© Snapshot Science, 2012