论文部分内容阅读
将同桌的两位同学编成一组,发一块用窗玻璃切割的长约15厘米、宽约10厘米的玻璃板,在桌面上放一张作业本大小的白纸,一位同学让玻璃板靠着物理书立在纸上,保持玻璃板和纸面垂直.另一们同学用笔在玻璃板和纸面的交接处画一条直线,表示平面镜的位置;然后,用三角板和笔在玻璃板前的白纸上画一个任意三角形,在顶点上分别标出 A、B、C。此时,可以在玻璃板前面看到△ABC 在玻璃板后的虚像;
Combine the two classmates at the same table, send a glass plate about 15 cm long and about 10 cm wide, cut with a window glass, put a sheet of white paper of the size of the workbook on the desktop, and one classmate let the glass The board rests on the paper against the physical book, keeping the glass board perpendicular to the paper surface. The other students used a pen to draw a straight line at the intersection of the glass board and the paper surface, indicating the position of the plane mirror; then, using the set board and the pen on the glass Draw an arbitrary triangle on the white paper in front of the board. Mark A, B, and C on the vertices. At this point, you can see in front of the glass plate △ ABC behind the glass plate virtual image;