01 how does light travel

01 how does light travel

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  Where is therelight in this room? Light is all around us. Make a new title page: Light and Sound
• 2.
  How does lighttravel? Learning Objectives : To understand that light travels from a source. To know that light travels at a very high speed, much faster than sound.
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  Task Draw somelightning then try to explain which comes first, the clap of thunder or the flash of lightning? Why does one come before the other? What happens if you move further away from the storm?
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  Light travels much faster than sound. For example: Thunder and lightning start at the same time, but we will see the lightning first. 2) When a starting pistol is fired we see the smoke first and then hear the bang.
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  Light travels VERYFAST – around 300,000 kilometres per second. At this speed it can go around the world 8 times in one second.
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  8K Light shifts1 the Sun 2 Pluto 3 the Moon 4 the nearest star other than the Sun 5 a computer screen on your desk A almost instantly B 1.3 seconds C 10 hours D 8.5 minutes E 4 years How long does light take to reach us from... D 8.5 minutes C 10 hours B 1.3 seconds E 4 years A almost instantly
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  How light travelsDo Experiment A and B Remember the aim is to try and shine light on the board at the end! How do you know that light travels in a straight line Write a conclusion from each of the experiments that explains this
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  Investigating how lighttravels? How can you get the light to shine on the card? What does this tell you about the way light travels?
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  How did youget the light to shine on the white card? What does this tell you about the way light travels? Investigating how light travels?
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• 15.
  Explain what youhave seen Light travels in straight lines: Laser
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  Drawing light wavesLight travels in straight lines We can represent a ray of light using a straight line with an arrow to show the direction of travel Draw diagrams of today’s investigations using light rays
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  Light carries energyand travels as a wave. Light travels at 300 000 000 m/s or 300 000 km/s (much faster than sound). Light waves travel in straight lines. Summary
• 18.
  How does lighttravel? Learning Objectives : To understand that light travels from a source. To know that light travels at a very high speed, much faster than sound.