Reflection & Refraction
Reflection - The bouncing back of a wave when it hits a surface through which it cannot pass.
Refraction - The bending of a wave as it passes at an angle from one medium to another.
Incident Ray - Incoming ray.
Reflected Ray - The light ray that bounces off a surface.
Refracted Ray - The ray that has bent as it enters a new medium.
Normal Line - Imaginary line drawn perpendicular to the surface of a mirror or any surface.
Angle - The amount of bending that a light ray experiences.
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