According to media reports on December 9, it has recently been reported on the Internet that the Apple Watch will be sucked on the high-speed rail glass and cannot be removed. Many netizens came forward to conduct experiments with their own equipment. Some netizens said "it can be taken off", while others said "it can't be taken off". In this regard, a blogger explained:The reason why the Apple Watch cannot be removed is due to the "photoglue phenomenon", which is a physical phenomenon. When the smoothness of an object's surface exceeds a certain limit, the smoother it is, the greater the friction will be.
It is understood that optical lenses used for microscopes or telescopes are generally required to be extremely smooth. Scientists sometimes need to combine two lenses with different magnifications. They originally thought that lenses that are too smooth will be difficult to combine. But when optical lenses with particularly smooth surfaces and similar contact surface shapes come into contact with each other, it is as if the middle contact surface is coated with super glue.