https://www.youtube.com/watch?v=WbJBMZzh81k&t=41s Beautiful sand is placed on the sand to draw a Zen-style line drawing, is it very charming~ https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_22505834-e86f-4c04-9a2c-2c4224068001.jpg In the museum, you can see the traces of the sand pendulum. If you look closely, the sand pendulum swinging from different angles will draw a completely different figure. This kind of figure is called Lissajous curve. It is definitely a very elegant home decoration, admiring his rotating and swaying to draw complex and regular graphics, so that the mind is also quiet. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_c9e22d35-cc21-4eb5-86df-b00d0a3d5f22.jpg The 134-meter-tall size of the eucalyptus wood, with fine white quartz sand, can draw very perfect and delicate graphics. Because the pendulum is long, the frequency of the swing is steady and slow, which is fascinating. The motion of the sand pendulum consists of two orthogonal harmonic motions. When the two swing planes do not coincide, the sand pendulum will draw various patterns regularly! https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_bb70fd4a-da98-4067-a9c4-ba7caee723cc.jpg This product is simple to set up, if it is not used for a long time, it is very good to store! Do not throw away the sleeve that is hanging inside. When you want to smooth the sand, you can first pile the sand into a mound, put the sleeve back on the pendulum, swing and hang it to achieve the effect of smoothing the sand. Forming a uniform micro concave concave surface. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_f6bbf340-d7cd-405e-8876-e5bd08781e76.jpg • Simple harmonic motion and Lissajous curve The motion of the sand pendulum consists of two orthogonal harmonic oscillations. The position of the node on the pendulum determines the frequency ratio of two orthogonal harmonic oscillations. The release point of the pendulum determines the initial phase and amplitude of the two orthogonal harmonic vibrations. If the trajectories of two harmonically oscillating synthetic motions perpendicular to each other are a stable closed curve, this curve is called a Lissajous curve, and the Lissajous curve is mainly used for frequency and phase detection. See how the super-large eucalyptus sands work and draw beautiful totems. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_dc2d602a-c1ac-488e-b06f-d8a35e4d9e38.jpg ♥ Special instructions for international shipping: International shipping costs are more complicated, depending on the quantity and geographical area. Please contact us before you place an order. Product specifications: ► Product size: diameter 46.5cm height 134cm (assembly completed) ► Packing size: 52cm x 53cm x 9cm ► Material: beech, iron plating, quartz sand ► Origin: China Precautions: ► Keep away from humid, windy environments. ► This product needs to be organized by itself ► This product is a DIY product and cannot be returned once it has been opened.