Contents

## Is Presentism compatible with relativity?

presentism/possibilism are not only **incompatible with general relativity** but also with quantum theory.

## What is meant by simultaneity of relativity?

In physics, the relativity of simultaneity is **the concept that distant simultaneity – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer’s reference frame**.

## What does it mean by the statement simultaneity is not absolute According to the theory of special relativity?

Einstein concluded that simultaneity is not absolute, or in other words, that **simultaneous events as seen by one observer could occur at different times from the perspective of another**. It’s not lightspeed that changes, he realized, but time itself that is relative.

## Is simultaneity a consequence of special relativity?

**The relativity of simultaneity is the concept that simultaneity–whether two events occur at the same time–is not absolute, but depends on the observer’s frame of reference**.

## How do you explain simultaneity?

*So let's break it down now remember the concept of simultaneity is. The idea that any two vents that may be perceived. By one observer to be simultaneous that is they occur at the same time.*

## How relative motion is relates to explaining two simultaneous event?

Whether two events at separate locations are simultaneous **depends on the motion of the observer relative to the locations of the events**. (a) Two pulses of light are emitted simultaneously relative to observer B. (c) The pulses reach observer B’s position simultaneously.

## Do any two observers always agree on simultaneity of events Why?

Two observers in relative motion will agree that two events are simultaneous: Two observers in relative motion will agree that two events are simultaneous: **Never since they are both moving**. **Always only if they occur at the same time**.

## What is relativity of simultaneity time dilation?

Two events are defined to be simultaneous if an observer measures them as occurring at the same time. They are not necessarily simultaneous to all observers—simultaneity is not absolute. Time dilation is **the phenomenon of time passing slower for an observer who is moving relative to another observer**.

## Do simultaneous events exist?

**Only at most one will agree they happened at the same time**. No, there is no absolute agreement on simultaneity. Alpha Centauri is about three light years from us. We know that it existed three years ago because we can see it in the sky as it was, for us, three years ago.

## What is simultaneity problem?

What Causes It? Simultaneity **happens when two variables on either side of a model equation influence each other at the same time**. In other words, the flow of causality isn’t a hundred percent from a right hand side variable (i.e. a response variable) to a left hand side variable (i.e. an explanatory variable).

## Will it be possible for a moving person to observe two events happening simultaneously with respect to inertial frame given that another person?

Answer and Explanation: From the special theory of relativity two events which are observed simultaneous in one inertial frame of reference **may not be simultaneous in other frame of reference**.

## Under what condition will two events at different locations be simultaneous in both frames?

In order for the two events to be simultaneous in frame S′, they must be both be on its x′-axis, so, the only way it can be simultaneous for both observers is **if S and S′ are not moving relative to eachother so that their worldlines are parallel**.

## When two observers are moving at relativistic speeds relative to each other do they still agree on each other’s measurement of speeds?

Explanation of Solution

Thus, the speed of light measured by both the observers who are in relative motion is same. The relative speed between the two observers will be same. Therefore, **they agree about their own relative speed**.

## How is relativity used in everyday life?

“Since this is the core principle behind **transformers and electric generators**, anyone who uses electricity is experiencing the effects of relativity,” Moore told Live Science. Electromagnets work via relativity as well. When a direct current of electric charge flows through a wire, electrons drift through the material.

## What is it in the general theory of relativity that does not involve the special relativity?

Special relativity applies to all physical phenomena in the **absence of gravity**. General relativity explains the law of gravitation and its relation to other forces of nature.

## Which form of relativity applies for observers who are accelerating?

Special relativity

**Special relativity** deals with observers moving at constant velocity; this is a lot easier than general relativity, in which observers can accelerate with respect to each other.

## What is different about the reference frames that apply to special relativity and to general relativity?

What is different about the reference frames that apply to special relativity and to general relativity? **Special relativity applies to frames of reference moving at constant velocity, whereas general relativity includes accelerating reference frames**. In special relativity, there are no forces and no acceleration.

## Does the principle of relativity require that every observer observe the same laws of physics explain?

And, given that relativity is a study of how observers in different reference frames measure the same event, **it is not necessary** that every observer will observe the same laws of physics happening.