miércoles, 11 de agosto de 2010

vocabulary : light and Mirrors


  • bioluminescence = light poduced by living oganisms .






  • lightray = astaight - line beam of light as ittravels outward   from its source .










  • law of efleccction = the angle ofan incoming light ray equals the anglesof the reflected ray .












  • concave mirror = a mirror that curves in on the shiny side.












  • convex mirror= a mirror that curves out on the sihy side .

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