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7 Sci Ch 9-2 vocab

7th Grade Science Chapter 9 Lesson 2 vocabulary

TermDefinition
ray A straight line used to represent a light wave
regular reflection Reflection that occurs when parallel rays of light hit a smooth surface and all reflect at the same angle.
image A copy of an object formed by reflected or refracted rays of light.
diffuse reflection Reflection that occurs when parallel rays of light hit an uneven surface and all reflect at different angles.
plane mirror A flat mirror that produces an upright virtual image the same size as the object.
virtual image An upright image formed where rays of light appear to come from.
concave mirror A mirror with a surface that curves inward.
optical axis An imaginary line that divides a mirror in half.
focal point The point at which light rays parallel to the optical axis meet, or appear to meet, after being reflected (or refracted) by a mirror (or lens).
real image An upside-down image formed where rays of light meet.
convex mirror A mirror with a surface that curves outward.