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Video Instruction
showmethephysics.com
Assessment
How to make things 'disappear'.
Steve
Spangler YouTube Channel
Fill In the Blank Notes
C.
Refraction – the
bending of light that occurs when a light wave passes
through a boundary between two media
Waves, Refraction, Velocity, Wavelength
[ Flash ]
Waves, Refraction, Velocity, Wavelength
Slow to Fast Medium
[ Flash ]
Any device with a lens refracts light
A pencil in water
demonstrates refraction
The faster the medium, the larger the angle a light ray makes
with the normal
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Top Medium is faster
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Explore: Lenses Use Refraction
A lens is shaped so refraction bends light toward (or away from) a focal point.
Drag the orange object to see the image move. Switch between converging and diverging lenses.
More: Lenses & Mirrors lessons
Check Your Understanding
5 quick questions — pick an answer to see if you’re right.
1. What is refraction?
2. When light enters a new medium at an angle, what happens to it?
3. A light ray makes 40° with the normal in medium A and 25° with the normal in medium B. Which medium is faster?
4. A pencil standing in a glass of water looks bent at the water's surface. This is caused by
5. Which device works mainly by refracting light?
