GreenLRan said:Suppose event A causes event B. To one observer, event A comes before event B. Is it possible that in another frame of reference event B could come before event A? If so, how?
This implies that B is in the interior of, or on the boundary of, the future light cone of A.GreenLRan said:Suppose event A causes event B.
The only information that this adds is that B isn't on the boundary of the future light cone of A, so it must be in the interior.GreenLRan said:To one observer, event A comes before event B.
No. If B had been outside of the future light cone of A, it would have been a different story. I suggest that you draw space-time diagrams to see why this is so.GreenLRan said:Is it possible that in another frame of reference event B could come before event A? If so, how?
A frame of reference in science is a set of coordinates or parameters used to describe the position or motion of an object relative to another object or system.
A frame of reference is important because it allows us to accurately describe and measure the position, velocity, and acceleration of objects in relation to other objects or systems. It also helps us to understand the concept of relativity and how different observers may perceive the same event differently.
Some common frames of reference include the Earth's surface, fixed stars, and a moving vehicle. In physics, the most commonly used frame of reference is an inertial frame, which is a frame in which Newton's laws of motion are valid.
Frames of reference can affect measurement by introducing relative motion and changing the perceived size, shape, and direction of an object. It is important to choose an appropriate frame of reference when making measurements to ensure accurate and consistent results.
Yes, multiple frames of reference can be used at the same time, as long as they are consistent and account for all relevant factors. For example, a moving car can be described using both an inertial frame (relative to the road) and a non-inertial frame (relative to the car's passengers).