器材凸透镜、硬纸片、红绿蓝三种颜色的玻璃纸、剪刀、白色光屏或白色墙壁、胶水等。制作方法用剪刀将硬纸片剪成与凸透镜大小一致的圆片,在圆纸片上挖三个大小、形状均相同的窗孔,使之呈“品”字形,如图所示。用胶水将红、绿、 Equipment convex lens, cardboard, red, green and blue three colors of cellophane, scissors, white light screen or white walls, glue and so on. Production methods Use scissors to cut the cardboard into pieces with the same size as the convex lens, and dig three holes of the same size and shape on the round paper to make it “character”, as shown in the figure. With glue will be red, green,