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一、课本是学生学习的依据,不应疏忽。谋本第64页,第六行中,v_1=vsinθ误写为:v_1=vcosθ。二、课本插图应力求准确。课本第218页,图5-39。物距大于焦距,小于2倍焦距,像距应大于2倍焦距,S’到主光轴距离应大于S到主光轴距离。课本图中误把像S’画在2倍焦距之内,到主光轴距离小于S到主光轴距离。本图虽然只是定性说明像是通过凸透镜的所有光
First, textbooks are the basis for student learning and should not be neglected. In the sixth line of the plan, on page 64, v_1=vsinθ is miswritten as: v_1=vcosθ. Second, the textbook illustrations strive to be accurate. Textbook page 218, Figure 5-39. The object distance is greater than the focal length, less than 2 times the focal length, and the image distance should be greater than 2 times the focal length. The distance from S’ to the main optical axis should be greater than the distance from the S to the main optical axis. In the textbook diagram, the image S′ is mistakenly drawn within 2× focal length, and the distance from the main optical axis is less than the distance from S to the main optical axis. Although this figure only qualitatively explains all the light passing through the convex lens