Source, Things that emit (give out) light or sound., Reflect, Bounce off., Eye, Organ of sight, which focuses and detects light., Transmit, When light or other radiation passes through an object, Transparent, Objects that transmit light and you can see through them., Translucent, Objects that transmit light but diffusing (scattering) the light as it passes through., Opaque, Objects that absorb, scatter, or reflect light and do not allow any light to pass through, Virtual, An image that cannot be focused onto a screen., Plane, A mirror which a flat, reflective surface, Incident ray, The ray coming from a source of light., Reflected ray, The change in direction of a ray or wave after it hits a surface and bounces off, Normal, An imaginary line at right angles to a surface where a light ray strikes it., Specular reflection, Reflection from a smooth surface, Diffuse reflection, Reflection from a rough surface., Convex, A lens that produces converging rays of light, Prism, A triangular-shaped pieces of glass used to produce a spectrum of light., Dispersion, The splitting of a ray of light of mixed wavelengths by refraction into its components..

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