According to Einstein’s special theory of relativity, **it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space**.

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## Is there a situation where two events that occur at the same time for one observer can be simultaneously to a second observer moving with respect to the first?

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.

## Is simultaneity possible?

There is no absolute fact as to whether two spatially separated events are simultaneous. **There is only a fact of simultaneity or its failure relative to an inertial frame of reference**. That a moving clock slows and moving rod shrinks is something most of us get used to with a little thought.

## When would two observers always agree about the simultaneity of two events?

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**. Always only if they occur at the same place and time.

## What do you mean by simultaneity of two events?

According to Einstein’s definition of simultaneity, **two events are simultaneous in a given system of reference, if they occur at the same time, as measured by clocks that have been synchronized using light signals**.

## Can two events happen at the same time?

**Yes, two events in the universe can happen at exactly the same time**. In fact, a surprisingly large variety of events which occur at different points in space can be made to look as if they are simultaneous, provided you are free to select the frame of reference of the events and the observer(s).

## What is twin paradox theory?

In physics, the twin paradox is a thought experiment in special relativity involving identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more.

## 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**…

## 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**.

## Is it possible that they may not be simultaneous in a different inertial frame?

**Events that are simultaneous in one inertial frame can never be simultaneous in another different inertial frame**.

## When two events can happen at the same time the events were known as _____?

**Inclusive events** are events that can happen at the same time. To find the probability of an inclusive event we first add the probabilities of the individual events and then subtract the probability of the two events happening at the same time.

## What is it called when two events occur at the same time?

**Joint probability** is a statistical measure that calculates the likelihood of two events occurring together and at the same point in time. Joint probability is the probability of event Y occurring at the same time that event X occurs.

## What is called when two events are at the same time?

Some common synonyms of simultaneous are **coeval, coincident, contemporaneous, contemporary, and synchronous**. While all these words mean “existing or occurring at the same time,” simultaneous implies correspondence in a moment of time.

## Is it possible for two observers to disagree about whether two events happened at the same time and for both of them to be correct?

Description. According to Einstein’s special theory of relativity, **it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space**.

## 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**.

## Is a special type of reference where an observer does not accelerate?

In classical physics and special relativity, an **inertial frame of reference** is a frame of reference that is not undergoing acceleration.

## Which of the following is example of inertial frames of reference?

Thus, it can be said that an inertial frame of reference either remains at rest or moves with a constant velocity. For example, **a car at standstill or a bus moving with constant speed** are considered to be inertial frames of reference.

## What is the difference between inertial frame of reference and non-inertial frame of reference?

The phrase “inertial frame of reference” refers to a frame of reference that is neither moving nor moving at a constant pace. A non-inertial frame of reference is one that is accelerating or traveling in a cyclic route at a constant pace.

## What principle states that laws of physics must be the same in all inertial frame of reference?

**The principle of relativity** asserts: The laws of physics are the same in all inertial frames of reference.

## What are inertial and non-inertial frame of reference explain with examples?

An example of this is a flat surface like a table which a ball is rolled across. All three of Newton’s laws of motion are only true in an inertial frame of reference. **If the frame does exhibit acceleration then it is a non-inertial frame of reference.**

## How can you apply the concept of inertial and non-inertial frames of reference in your daily life?

Let’s assume the vehicle is moving in a straight line. **If the vehicle is not accelerating, the passenger is in an inertial frame of reference**. This is because no acceleration means your velocity is constant. If the vehicle is accelerating, the passenger is now in a non-inertial frame of reference.

## What are inertial and non-inertial frames of reference is an aircraft in steady flight an inertial frame or non-inertial frame?

Answer. Answer: Steady flight is defined as **flight where the aircraft’s linear and angular velocity vectors are constant in a body-fixed reference frame such as the body frame or wind frame**.

## What is non-inertial frame of reference explain concept of pseudo force with example?

**These forces have no real existence but must be taken into account in an accelerating frame of reference to make the Newton’s Laws of motion applicable on the system**. Example: Centrifugal force is a pseudo force that is considered when a body is moving in a circular path.

## Which among the following is a pseudo force normal force frictional force centrifugal force gravitational force?

Detailed Solution. The correct answer is option 1, i.e. **Centrifugal force**. Centrifugal force is also known as pseudo force.

## What is pseudo nature of centrifugal force in uniform circular motion?

The centrifugal force is a pseudo-force because if the centripetal force ceased for an object in circular motion, the centrifugal force the body is “feeling” would instantly disappear, and the object would travel tangentially to its line of motion.

## Why Newton’s laws of motion do not hold true in a non-inertial frame of reference?

Such an accelerating frame of reference is called a non-inertial frame because **the law of inertia does not hold in it**. That is, an object whose position is judged from this frame will seem to spontaneously change its velocity with no apparent non-zero net force acting upon it.

## Can we apply Newton’s laws for two accelerating same acceleration frames with respect to each other?

Yet, when the reference frame accelerated the objects appeared to move without any external forces acting on them. This violates Newton’s first law. Therefore, the answer to the original question is TRUE, **Newton’s laws apply only to reference frames that are not accelerating**.

## Is Newton’s law valid in non-inertial frame?

Non-inertial frame of reference: The frame of reference having non-zero acceleration is called the non-inertial frame of reference. **The newton’s law is not valid** in this frame of reference.