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Section 11.1
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1
What happens to a light ray when it travels from one medium to another medium that has a different refractive index?
A)The speed of light changes, while the direction of travel remains the same.
B)The speed of light remains the same, while the direction of travel changes.
C)The speed of light and the direction of travel change.
D)There is no change to the speed of light or direction of travel.
2
Which statement best describes what happens during refraction?
A)If a light ray goes from a medium in which its speed is higher into a medium in which its speed is lower, the refracted ray bends away from the normal.
B)If a light ray goes from a medium in which its speed is higher into a medium in which its speed is lower, the refracted ray continues straight through without changing directions.
C)If a light ray goes from a medium in which its speed is lower into a medium in which its speed is higher, the refracted ray bends toward the normal.
D)If a light ray goes from a medium in which its speed is lower into a medium in which its speed is higher, the refracted ray bends away from the normal.
3
What is the angle of refraction?
A)It is the angle between the reflected ray and the refracted ray.
B)It is the angle between the normal and the refracted ray.
C)It is the angle between the reflected ray and the normal.
D)It is the angle between the incident ray and the refracted ray.
4
What are the variables used to calculate the index of refraction?
A)speed of light in a vacuum and speed of light in a medium
B)angle of refraction and angle of incidence
C)speed of light in a vacuum and angle of refraction
D)speed of light in a medium and angle of refraction
5
Which statement is true about the index of refraction?
A)The index of refraction is less than one.
B)The index of refraction is determined by dividing the speed of light in a vacuum by the speed of light in a medium.
C)The index of refraction is determined by dividing the speed of light in a medium by the speed of light in a vacuum.
D)The index of refraction shows that the speed of light in a vacuum is always slower than the speed of light in a medium.
6
What is dispersion?
A)Dispersion is the process in which an incident ray bends as it travels from one medium to another and creates a reflected ray and a refracted ray.
B)Dispersion is used to calculate the ratio between the speed of light in a vacuum and the speed of light in a particular medium.
C)Dispersion refers to the principle that light will travel along the path that will take the least amount of time.
D)Dispersion is the separation of white light into different colours as it crosses the boundary between two media at an angle.





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