Refraction of Light (Grades 11-12)
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Refraction of Light
1.
When you see a straw in a glass of water it looks bent, why is this?
- diffraction
- reflection
- refraction
- polarization
2.
Light travels through all transparent media at the same speed.
- True
- False
3.
What is refraction? Include a real world example as part of your explanation.
4.
How light propagates through a material is given by the ratio of the speed of light in vacuum to the speed of light in that material. What is this ratio called?
- reflection ratio
- ratio of bending
- light speed index
- refractive index
5.
The imaginary line perpendicular to the boundary of two materials or to a reflective surface is called the .
- normal
- phase line
- refractive path
- reflection path
6.
When a light ray traveling along the normal hits the boundary of two materials, it changes its but not its .
7.
When a ray of light passes from air, a less dense medium, to glass, a more dense medium, the ray of light will bend the normal.
- towards
- away from
8.
What occurs when the angle of incidence of a light ray is greater than the critical angle?
- critical refraction
- total internal reflection
- total external reflection
- dispersion
9.
The refractive index of water will change with its temperature due to the change in density of its molecules.
- True
- False
10.
Some fiber optic cables are made with various materials arranged in such a way that the refractive index of the cable changes gradually. These are called fibers.
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