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1 光的折射教具的制作ａ .材料 :无色透明洗发香波塑料空瓶一个 (或无色玻璃瓶一个 ) ;黑色记字帖 (长 1 5ｃｍ、宽 5ｃｍ左右 )二条 ;清水少许。ｂ .制作 :①将二条黑色不透明的记字帖粘在无色塑料瓶的外面一侧 ,并在两条记字帖中间留有 2ｍｍ的竖直狭缝 (如图 1 -ａ)。②将
1 Refraction teaching aids for the production of a material: colorless transparent shampoo plastic empty bottle (or a colorless glass bottle); black copybook (length 15cm, width 5cm or so) two; a little clear water. b. Making: 1 Stick two black opaque copybooks on the outer side of the colorless plastic bottle and leave 2mm vertical slits between the two copybooks (Figure 1-a). 2 will