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Questions and Answers
What happens to the speed of light when it passes from air into glass?
What happens to the speed of light when it passes from air into glass?
- It increases
- It stays the same
- It decreases (correct)
- It becomes unpredictable
What is the angle of refraction if a light ray is incident perpendicular to the surface of a medium?
What is the angle of refraction if a light ray is incident perpendicular to the surface of a medium?
- 0 degrees (correct)
- 90 degrees
- Depends on the specific medium
- 45 degrees
In which medium does light travel fastest?
In which medium does light travel fastest?
- Air (correct)
- Diamond
- Steel
- Water
What is the phenomenon where light bends as it passes from one medium to another?
What is the phenomenon where light bends as it passes from one medium to another?
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What is the angle of refraction if a light ray is incident at an angle of 45 degrees to the surface of a medium with a refractive index of 1.5?
What is the angle of refraction if a light ray is incident at an angle of 45 degrees to the surface of a medium with a refractive index of 1.5?
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In which of the following mediums does light travel slowest?
In which of the following mediums does light travel slowest?
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Study Notes
Refraction of Light
- When light passes from air into glass, its speed decreases due to the increased density of the medium.
- When a light ray is incident perpendicular to the surface of a medium, the angle of refraction is zero, meaning the light continues straight without bending.
- Light travels fastest in a vacuum, where there is no medium to slow it down.
- The phenomenon where light bends as it passes from one medium to another is called refraction.
- If a light ray is incident at an angle of 45 degrees to the surface of a medium with a refractive index of 1.5, the angle of refraction can be calculated using Snell's law.
- Light travels slowest in the densest medium, such as diamond, where the speed of light is approximately 124,000 km/s.
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