Motion Wall Clock is our new design. The background of the clock is moving and lively. But it is not LCD. Just the clock dial moving to make the visual effect.Motion Wall Clock is cheaper and only need 1D battery supported. If you are thinking about buying a new clock, please try this one. It will surprise you.
Size: 12 inches
Material: ABS
Weight: 0.72kg
Battery: 1D
Motion Wall Clock,Hang Wall Clock,Round Wall Clock,Cute Wall Clock Guangzhou Huan Yu Clocking Technologies Co., Ltd. , https://www.mk-time.com
"Camera and Eye Vision Correction" Su Ke Edition ppt Courseware
Use of the camera (1) Use a homemade camera to look at the Fuwa slightly away, adjust the position of the convex lens, what kind of image can you see on the light screen? And mark the position of the outer paper tube on the inner paper tube. (2 ) Use a self-made camera to look at the neon lights nearby, adjust the position of the convex lens, and observe whether the image of the neon light becomes larger or smaller? How does the distance between the convex lens and the light screen change? Test you 1. The camera lens is equivalent to a ______ mirror , It is made by using the principle that the convex lens forms the real image of _____, _____. 2. When Xiaoming shoots the scene with a camera with a fixed focal length, if he brings the camera close to the scene being shot, the scene is clear on the film The image will be ________ (larger / smaller). The camera lens should be directed toward ____ (forward / retract)