Can we evaluate the impact of a critical detail? The role of a type of diagram in understanding optical imaging

摘要: This paper describes an attempt at evaluating a potentially critical “detail” of teaching practice; that is, using particular diagram to illustrate the imaging role converging lens. “basic” has been designed contribute help students overcome well‐known “travelling image” syndrome. We conducted comparative study with 125 in all, three academic levels: end secondary school, degree students, and teacher training. The groups compared had previously taught elementary optical classical, uncontrolled manner, were presented two classical questions, commonly used demonstrate students’ difficulties. In each group, one‐half classic introductory other half one. A positive reaction evaluated was observed relatively high level (trainee physics teachers students), contrast apparent lack effect school. T...