]Shown here are the results of Young\'s experiment demonstrating the interferenc
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Question
]Shown here are the results of Young's experiment demonstrating the interference of light. What does the observation of an interference pattern show about the nature of light? (See page 385-386 in your textbook for more on this experiment.)
1. It shows that all colors of light have the same refractive index.
2. It shows that different colors of light have different refractive indices.
3. It shows that light consists of particles.
4. It shows that light consists of waves.
5. It shows that light can be separated into different colors by a prism.
How do we know that different colors of light have different speeds in a material?
1. because Fizeau's measurements measured different colors of light to have different speeds
2. because the index of refraction depends on the speed of light in a material, and that index is different for different colors
3. because different colors reflect at different angles
4. because of measurements by Galileo of the speed of different colors of light
5. because the colors combine to form white light
Explanation / Answer
A)4. It shows that light consists of waves. is correct
B)2. because the index of refraction depends on the speed of light in a material, and that index is different for different colors is correct
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