Review: Light reflection and refraction
This review covers the principles of light reflection and refraction, explaining how light behaves when it encounters different surfaces and mediums.
Quiz(14 questions)
1. What occurs when light hits a reflective surface?
Terms in this Study Set(15)
What is reflection?
Reflection is the bouncing back of light when it hits a surface. It occurs at a boundary between two different media.
What is refraction?
Refraction is the bending of light as it passes from one medium to another. It changes speed and direction.
True or false: Light can be reflected and refracted.
True, because light can change direction both when bouncing off surfaces and when entering new media.
Difference between reflection and refraction.
Reflection is bouncing off a surface. Refraction is bending when entering a new medium.
What law describes reflection?
The law of reflection states that the angle of incidence equals the angle of reflection.
Fill in the blank: The speed of light is approximately _____ in a vacuum.
The speed of light is approximately 299,792 kilometers per second (186,282 miles per second).
What is the normal line?
The normal line is an imaginary line perpendicular to the surface at the point of incidence.
What happens to light at a denser medium?
Light slows down and bends towards the normal when entering a denser medium.
Question: What is the critical angle?
The critical angle is the angle of incidence that produces total internal reflection.
True or false: All surfaces reflect light equally.
False, because smooth surfaces reflect light better than rough surfaces.
What happens as light passes from air to water?
Light slows down and bends towards the normal line due to a change in medium.
What is total internal reflection?
Total internal reflection occurs when light hits the boundary at an angle greater than the critical angle, reflecting all the light back.
Comparison: Convex lens vs. Concave lens.
Convex lenses converge light rays. Concave lenses diverge light rays.
Fill in the blank: The refractive index determines how _____ light bends.
The refractive index determines how much light bends when passing through a medium.
What variable represents the angle of incidence?
The angle of incidence is represented by the letter .
Questions in this Study Set(14)
1. What occurs when light hits a reflective surface?
2. Which of the following describes refraction?
3. Which material has a higher refractive index, water or air?
4. What happens if light hits a boundary at the critical angle?
5. Which of the following is NOT a refractive medium?
6. How does a convex lens affect light rays?
7. What is the effect of a rough surface on light?
8. What angle represents the angle of reflection?
9. In which medium does light travel fastest?
10. What principle governs the bending of light?
11. What occurs to light when it passes from water to air?
12. Which lens type can create virtual images?
13. How is light affected by a prism?
14. What is the role of the normal in reflection?
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