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- 1. Multiple Choice
What happens to light during total internal reflection?
The light reflects back into the original medium at the same angle.
The light refracts closer to the normal line.
The light refracts farther away from the normal line.
The light reflects at the angle it would have refracted at.
- 2. Multiple Choice
When angle of incident (i) equals to critical angle (c) if light is traveled from a denser medium to a less dense medium,
total internal reflection occurs.
angle of refraction is equal to 90 degree.
light is refracted out
light travel in straight line
- 3. Multiple Choice
Why does the pencil appear bent?
Light rays travelling from parts of the pencil above the water bend away from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil above the water bend towards from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil under the water bend away from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil under the water bend towards from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
- 4. Multiple Choice
What is total internal reflection
Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.
Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.
Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.
Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.
- 5. Multiple Choice
What happens to the speed of light in a more optically dense medium?
it slows down
it speeds up
stays the same because all light travels at the speed of light
- 6. Multiple Choice
When will total internal reflection occur?
When light travels from a less dense to a more dense medium
When the angle of incidence is smaller than the critical angle
When the angle of incidence is greater than the critical angle
When the light cannot pass through a medium
- 7. Multiple Choice
When the angle of refraction is 90 the angle of incidence is called the...
Angle of incidence
Critical angle
Angle of total internal reflection
Angle of refraction
- 8. Multiple Choice
For total internal reflection to occur, light must
travel from a more dense to a less dense medium
travel from a less dense to a more dense medium
- 9. Multiple Choice
What is the refractive index of a fibre optic pipe if the critical angle is 30 degree?
Outside is air.
2.0
1.7
2.4
- 10. Multiple Choice
Choose the correct statement that describes what happens to the ray of light if the critical angle is 48o and the angle of incidence is 48o
refract
totally internally reflect
travel along the boundary
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