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Difference between revisions of "Terminology"
expand definition of tritium
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;<span id="TIR">TIR</span>: total internal reflection. A glass or plastic "lens" that collimates light rays from the light emitter, both by reflecting them and by refracting them. Theoretically, ALL of the light produced by the emitter is gathered by the TIR optic. See article [[Lenses]]. | ;<span id="TIR">TIR</span>: total internal reflection. A glass or plastic "lens" that collimates light rays from the light emitter, both by reflecting them and by refracting them. Theoretically, ALL of the light produced by the emitter is gathered by the TIR optic. See article [[Lenses]]. | ||
;trit: tritium, a radioactive isotope of hydrogen | ;trit: tritium, a radioactive isotope of hydrogen. Packed in small vials or cubes where the emitted electrons will strike phosphor and emit light, a vial can be attached to a flashlight so that you can find it in the dark. The brightness fades over time, reducing fifty percent during a half-life of 12.3 years. Different colors are available depending on the phosphor used. | ||
;twisty: a method of controlling a flashlight - loosening or tightening the head, control ring, or tailcap turns the light on or off or changes its level or mode. Many lights turn on with the head tightened, but some turn on with the head loosened. | ;twisty: a method of controlling a flashlight - loosening or tightening the head, control ring, or tailcap turns the light on or off or changes its level or mode. Many lights turn on with the head tightened, but some turn on with the head loosened. | ||