13.3. Refraction of Light http://www.ck12.org
FIGURE 13.2
- When light is traveling from air into another medium, Snell’s Law states thatn=sinsinθθri.
- The index of refraction is also related to the relative speeds of light in a vacuum and in the medium.n=
speed of light in a vacuum
speed of light in the medium - When a ray of light is traveling from one medium into another medium, Snell’s Law can be written asnisinθi=
nrsinθr.
Practice
Questions
Use the video on refraction to answer the questions below.
http://video.mit.edu/watch/mit-physics-demo-refraction-a-total-internal-reflection-12044/
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/80965- What happens to the path of a light beam when it enters a new medium at an angle?
- Light moving from air into water is bent ___ the normal.
- Light moving from water into air is bent ___ the normal.
Review
Questions
- Light moving through air is incident on a piece of crown glass at an angle of 45◦. What is the angle of
refraction?