薄透镜焦距测定中L>4f条件的讨论

Discussion about the L>4f condition on the determination of focal length of the thin conven lens

对二次成像法测定薄透镜焦距中设定的L>4f条件,先用初等数学方法给予说明,再用高等数学方法加以证明,并由此得出初等数学和高等数学在处理问题中的差别.

By using the theories of elementary mathematics and advanced mathematics,this thesis illuctrates and proves the L〉4f condition on the cleterminat of focal length of the thin conven lens by means of quadratic formation of image. It also discusses the differences between the elementary mathematics and advanced mathematics in dealing with problems.