Table of Contents
- 1 Which of the following will two observers in different reference frames always agree on?
- 2 How would two observers measure a different speed for the same moving object?
- 3 What are two measurements of motion?
- 4 What quantity is constant regardless of the velocity of the observer?
- 5 Do relative velocity have dimensions?
- 6 When two observers moving relative to each other measure a time interval or a length they will?
- 7 Is the speed of light constant for two observers moving relative?
- 8 Do two observers have universal agreement on relative velocity?
Which of the following will two observers in different reference frames always agree on?
The observers will always agree on ds2 both in special and general relativity. They both agree that the speed of the light is locally c in vacuum. They also agree on number of the particles. Notice that not every reference frame is allowed and meaningful in relativity.
How would two observers measure a different speed for the same moving object?
Special Relativity. Velocity Addition: If observers in two different frames of reference (that are in motion relative to each other) are observing motion of the same object, they will both measure it to be traveling at different speeds.
What are the two cases of relative velocity?
Mathematically we can say that relative velocity is vector difference between two velocities. Cases 1 : Person walking on treadmill. Case 2 : Person running inside a moving train and other watching from outside.
What are two measurements of motion?
Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. The motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame with change in time.
What quantity is constant regardless of the velocity of the observer?
Considering the results of the Michelson-Morley experiment led Einstein to develop the theory of special relativity. The key premise to special relativity is that the speed of light (called c = 186,000 miles per sec) is constant in all frames of reference, regardless of their motion.
What is a space relative to which motion is measured?
A “frame of reference” is a standard relative to which motion and rest may be measured; any set of points or objects that are at rest relative to one another enables us, in principle, to describe the relative motions of bodies.
Do relative velocity have dimensions?
The observers moving at constant velocity, therefore, measure same acceleration of the object. The important aspect of relative velocity in one dimension is that velocity has only two possible directions. We need not use vector notation to write or evaluate equation of relative velocities in one dimension.
When two observers moving relative to each other measure a time interval or a length they will?
When two observers are in motion relative to each other, each will measure the other’s clock slowing down, in concordance with them being in motion relative to the observer’s frame of reference.
What two speed measurements do two observers in relative motion always agree on?
The obvious examples are the 4 momentum and the 4 velocity. Originally Answered: What two speed measurements do two observers in relative motion always agree on? They each agree on the speed of the other observer relative to them, and they each agree on the speed of light. 8 clever moves when you have $1,000 in the bank.
Is the speed of light constant for two observers moving relative?
This of course was proven wrong by Einstein – the speed of light is indeed constant for two observers moving relative to each other and measuring the speed of the SAME light ray and there is no Aether facilitating the movement of the light. 1) It is assumed that the only difference for the two physicists is the uniform velocity.
Do two observers have universal agreement on relative velocity?
Objectively the two observers will n Depends on how you look at it, Subjectively from each point of view, they will have universal agreement on relative velocity because they cannot detect the differences presented by time dilation via electromagnetic observation.
Is the speed of light an invariant in special relativity?
In fact the speed of light is an invariant in SR precisely because it’s the magnitude of a four velocity. Actually I don’t think there are many exciting scalars in special relativity. Moving to general relativity adds some more important scalars such as the scalar curvature and the Kretschmann scalar.