electromagnetic - _____ spectrum: the complete range of electromagnetic waves placed in order of increasing frequency, transparent - material which transmits all light, translucent - material which allows some light to be transmitted, while the rest is reflected or absorbed, opaque - material which reflects or absorbs all light, luminous - emitting light, law of reflection - the angle of incidence is equal to the angle of reflection, angle of incidence - the angle between the incident ray and the normal, diffuse reflection - scattered reflection of light from a rough surface, Convex mirror - A mirror with a surface that curves outward which reflects light divergently, concave mirror - a mirror with a surface that curves inward which reflects light convergently, refraction - The bending of a wave as it passes at an angle from one medium to another, angle of refraction - the angle between the refracted ray and the normal, Angle of emergence - Angle between emergent ray and normal, medium - Material through which a wave travels, convex lens - a lens that is thicker in the centre than at the edges which reflects light divergently, concave lens - A lens that is thinner in the centre than at the edges which reflects light convergently, converging lens - lens such that a beam of light passing through it come together at a focal point, diverging lens - a lens such that a parallel beam of light passing through it is caused to diverge or spread out, retina - Light sensitive layer of the eye; contains rods and cones, cornea - the transparent outer covering of the eye, optic nerve - the nerve that carries neural impulses from the eye to the brain, pupil - the adjustable opening in the center of the eye through which light enters, iris - a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening,

(Year 9) Light Glossary

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