Mathematics and Society - OS X Lion Server

(Materials Needed:Magnifying mirror, candle, 4 cm x 4 cm pieces of glass and clayA concave mirror is needed.An ordinary magnifying cosmetic or shaving mirrorwhich can be purchased at most drug stores is of this type.I1)Find the focal lengththe mirror.eRO",,,, e.E:C'IONOF A 5P14ERICI'.LMIRROR."-------0"" e ........,If the sunis out you can reflectthe sun's rays to a finepoint on a piece ofpaper. Use caution~ Ifo , ,~.,. \0\ \,Getting the feeling. c)\c o\, ,, ,of\ ,'~~THI: POIMT WHERI:ALL THE SUf\lSRAYS AREFOCU5ED ISTHI: FOCAL POlfJT. _THE DI'.:>TANCEBETWE.EN TI-IlSPOIIJT Af\lD THEMIRROR IS THEFOCAL U:IJ(;TH.you have a good mirror it will have the same effect as a magnifying glass andmay give a very hot focal point.If the sun is not out use any object that isa long way off and project its image onto a piece of paper.iscm.The focal length(2) Describe images. Put a candle in front ofa concave mirror as shown. Using a pieceof paper as a screen find the image. Describethe image using general terms (bigger,smaller, same shape, etc.)Move the candle about 2 metres in front ofthe mirror. Find the image with the paper.Again describe the image in general terms.IMAGE OF CAWOLE FLI\IJlCOlJ A PIECE OF PAPERTHE OBJE.GT MU~T BEAi A Dl'.:>T/llJCE FROM THEMIRROR GREATER THANTHE FOCAL LENGTH.(362