wave properties of light. important vocabulary reflection refraction diffraction
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Wave Properties of Light
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Important Vocabulary
Reflection
Refraction
Diffraction
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What do you see? Why?
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MirageOccurs when a layer of hot air
lies right above the ground.
Light can move through hot air faster than through colder air above
This causes a bending of light rays, refracted images of objects can be seen
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Refraction
Refraction: bending of waves caused by a change in
their speed when they move from one medium to another
Amount of bending depends on the speeds of light in both materials
The greater the difference in speed of light in the 2 materials, the more the light is bent
Examples: Sparkling diamond
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ReflectionReflection occurs when a wave
strikes an object and bounces off
Occurs with all types of waves (electromagnetic, sound, water)
The beam that bounces off the mirror is called the reflected beam
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Diffraction and InterferenceDiffraction: bending of waves around a barrier
Electromagnetic Waves, sound and water can all be diffracted
Water – bend around you as your swim
Important in the transfer of radio waves
Longer radio waves (AM radio stations) easier to diffract than FM