说明：  这个程序可以实现牛顿环(Newton s rings)的演示, 其中可调参数包括波长, 透镜曲率半径及最低点空气缝隙的厚度.参数的调节是通过欢快实现的,其中颜色 随波长近似的变化. 本程序可以增进读者对牛顿环的理解.
(this procedure can be achieved Newton Central (Newton's rings) demonstration. with adjustable parameters including wavelength, lens curvature radius and minimum thickness of the air gap. Parameter adjustment is achieved through the jubilant, With these color changes in the wavelength approximation. The procedure can improve readers to understand the Newton ring.)