Reflection
Physics: Cambridge International GCSE Supplement, topic 3.2.1
Reflection of Light
Light can be reflected by a plane (flat surface).
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Angle of incidence
- The angle of incidence is the angle between the incident (incoming) light ray and the normal.
- The normal is a line at 90 degrees to the plane.
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Angle of reflection
- The angle of reflection is the angle between the reflected light ray and the normal.
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Law of reflection
- The law of reflection states that the angle of incidence = the angle of reflection.
Images created by plane mirrors
- Images created by plane mirrors have the following characteristics:
- Same size as object.
- Same distance from mirror as object.
- They are virtual images.
Test yourself on Reflection
What is the normal?
What will happen to the angle of reflection if the angle of incidence increases?