CAJ | 학술논문

从薄透镜成像公式出发，推导出薄透镜物方和像方焦距公式，以凸透镜和凹透镜为例研究其焦距随介质折射率的变化规律。当介质折射率小于透镜折射率时，凸透镜起会聚作用，凹透镜起发散作用；当介质折射率大于透镜折射率时，凸透镜起发散作用，凹透镜起会聚作用。实验表明，实验结果与理论推导出的结论是一致的。
종박투경성상공식출발，추도출박투경물방화상방초거공식，이철투경화요투경위례연구기초거수개질절사솔적변화규률。당개질절사솔소우투경절사솔시，철투경기회취작용，요투경기발산작용；당개질절사솔대우투경절사솔시，철투경기발산작용，요투경기회취작용。실험표명，실험결과여이론추도출적결론시일치적。
Adstract:From the thin lens imaging formula,the formulas of the front focal length and the back focal length of the thin lens are deduced,and the changing law is examined of the focal length when the medium refractive index changes by a case study of the positive lens and negative lens.Results show that when the refractive index of the medium is less than that of the lens,concave lens play a convergent role,and the convex lens play a divergent role.But when the refractive index of the medi-um is greater than that of the lens,concave lens play a divergent role,and convex lens have a convergent effect.The experi-mental investigation shows that the experimental result is consistent with the theoretical conclusion.