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Refraction of light: definition, causes and the normal
Karten in diesem Stapel (7)
- 1What is Refraction?Refraction is when waves change direction as they enter a different medium (substance).
- 2What cause Refraction?Refraction is caused by the waves changing speed, due to a change in density from one medium to the other.
- 3What is a Medium?A Medium is the material through which a wave travels.
- 4What happens when light passes into a denser medium?The light slows down and the light rays bend towards the normal. This means that the angle of refraction is smaller than the angle of incidence.
- 5What happens when light passes into a less dense medium?The light speeds up and the light rays bend away from the normal. This means that the angle of refraction is greater than the angle of incidence.
- 6Describe what the normal is?The normal is at 90° to the boundary between the two media.
- 7Name a condition in which refraction will not occur?When the rays of light cross the boundary at 90°. In this case, they carry straight on.
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