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Questions and Answers
What is the angle of refraction when light travels from air to water?
What is the angle of refraction when light travels from air to water?
- Unrelated to the angle of incidence
- Equal to the angle of incidence
- Less than the angle of incidence
- Greater than the angle of incidence (correct)
What happens to the speed of light when it enters a denser medium?
What happens to the speed of light when it enters a denser medium?
- It decreases (correct)
- It remains the same
- It increases
- It becomes unpredictable
What color light bends the most when passing through a prism?
What color light bends the most when passing through a prism?
- Yellow
- Green
- Violet (correct)
- Red
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Study Notes
Refraction of Light
- When light travels from air to water, the angle of refraction is less than the angle of incidence, due to the decrease in speed of light as it enters a denser medium.
- The speed of light decreases when it enters a denser medium, resulting in a change in direction.
- This change in direction is known as refraction, which occurs because light travels at different speeds in different mediums.
Dispersion of Light
- When white light passes through a prism, it is split into its constituent colors, which bend at different angles due to their different wavelengths.
- Violet light has the shortest wavelength and bends the most, while red light has the longest wavelength and bends the least.
- This is why violet light is always seen at the outermost edge of the rainbow, and red light is seen at the innermost edge.
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