In this paper, the focal distance formula of lens in varied shapes is obtained by using object methods to make its physical meaning more obvious.
In this paper, the focal distance formula of lens in varied shapes is obtained by using object methods to make its physical meaning more obvious.
摘要采用直观的方法得出了空气中各种形状的薄透镜的焦距公式，使其物理意义更加明显。