The principle of fishing for the moon in ancient colorful tricks

Specular reflection in reflection phenomenon.

Fishing for the moon in the water means that a group of monkeys see the moon in the water and want to catch it. In fact, it is an image of the moon in the water. Because of the principle of plane mirror.

China's ancient color tricks have a long history. Since the Southern Song Dynasty, there have been performances in Washe, Jiexiang and Jubilance Hall in Hangzhou. Vaudeville always follows the tradition and always performs in a dress. Before the performance, you must show up, down, reverse and right, so that the audience can see the outside of Gabrielle. Artists pay attention to the "eight-character mantra", which is called "tie, tie, hide, hide, tear, lift, pick and untie". The preparations in the background are tied, tied, buried and stuffed, and they are torn, lifted, taken off and untied before and after living.