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本教具巧妙地运用了光的反射原理，生动有趣，可激发学生的学习兴趣。适用于初二物理“光的反射”的教学。１ 材料与制作 如图１所示做一个长×宽×高＝６０ｃｍ×３５ｃｍ×４５ｃｍ的带盖木箱。在箱的前后面（即６０ｃｍｘ４５ｃｍ面）的里面上，镶入两块与箱面等大的平面镜
This teaching aid cleverly uses the principle of light reflection, which is lively and interesting and can stimulate students’ interest in learning. It is suitable for the teaching of physical “reflection of light” in the second grade. 1 Materials and Production As shown in Fig. 1, a wooden box with lids of length × width × height = 60cm × 35cm × 45cm was made. On the inside of the front and back of the box (ie, the 60cmx45cm surface), insert two flat mirrors with the same size as the box surface.