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Reflection
The bouncing of light off a surface
Convergent
Moving towards a single point.
Ray
A narrow beam of light
Angle of Incidence
The angle between the incident ray and the normal
Normal
A line perpendicular to the surface
Incident Ray
The ray that first hits the surface
Reflected Ray
The ray that bounces off the surface
Angle of Reflection
The angle that the normal makes with the reflected ray
Diffuse reflection
Reflection off a surface that is not smooth and flat
Medium
A substance through which waves may travel
Laws of Reflection
1) Angle of Incidence=Angle of Reflection; 2) The normal, incident ray, and reflected ray all lie in the same plane
Luminous
Something that supplies its own light
Periscope
A tool that lets us see around things (often used in submarines)
Beam
More than one ray of light
Camera Obscura
A dark box that was the idea for the first camera
Divergent
Moving apart; deviating
Non-luminous
Something that does not emit its own light
Regular reflection
Reflection off of a smooth flat surface