Physics of Speed Detection

Speed ​​detection is one of the most notorious features of our local and state police. How long do they know how we are progressing? Speed ​​determination is done in two basic ways. First, the least complicated method depends on the ability of executives to estimate their speed. Secondly, the electronic method using radar and laser equipment can verify the guess of the staff. As you see, their guess is usually correct. What does this mean to you? Usually, a speeding ticket, or if your violation is openly ignoring safety, it is a friendly warning.

Speed ​​is a factor of many collisions due to the physical force during work. It takes more time to stop a speeding car, and it may interfere with the ability of the driver to detect a dangerous situation. IIHS reported that the severity of collision is directly related to speed. If you increase the speed by 50%, the energy released during a collision will be more than doubled. This increased power is a cause of serious injury and death. An occupant restraint system such as a seatbelt, an airbag, a child seat, etc. is ineffective at high speed, and this also causes injury and death.

February 11, 2016 is the landmark day. After decades of exploration, scientists announced that they first detected gravitational waves. It is a perturbation of the space-time structure that progresses at the speed of light. But the second victory of physics is hidden in its physics. So far the wave gave us the best proof that we have some of the most fascinating things in our universe: black hole. On the other hand, the black hole is the most powerful gravity power plant. When they remove substances from gas clouds between stars and stars, the substance is heated and shines brightly. This seems to be a paradox. What is invisible is the brightest thing in the universe. A black hole called Quasar has to be written billions of years ago

In this sense, observable terms do not refer to the ability of modern technology to detect light or other information about an object, or whether it is necessary to detect something. It means the physical limit of the speed of light itself. Since it can not go faster than the signal as much as it is, the objects far from us can be moved away from us during the age of the universe (estimated to be about 13.799 ± 200 million years in 2015). Occasionally astrophysicists use the visible universe that contains only signals emitted since reorganization and the observable space that contains signals since the beginning of the expansion of the universe (in the Big Bang of traditional physics, in the modern cosmology The age of inflation). End