形成蜃景的一条光线轨迹的计算

Calculation of a Ray of Trajectory to Form Fairland

用Barnard法测折射率梯度,然后据此写出折射率的表达式,代入光线微分方程中即可求出光线轨迹。与实际光拨路径的照片对比,结果十分吻合.再据此求出沙漠上空形成蜃景的一条光线的轨迹,并估计产生蜃景的物体的距离。

With Barnard method to measure gradient of a refractive index, expression of a refractive index is obtained. When the expression is put in a ray differential equation, we get a ray of trajectory at once. In contrast with a photograph of a real ray route, the result is fully coincide. Based on this, we can get a visionary ray trajectory in the sky of desert and estimate the distance of engendering fairyland of body.