What is the meaning of Spacelike?
not comparable
What do you mean by Lorentz transformation?
In physics, the Lorentz transformations are a six-parameter family of linear transformations from a coordinate frame in spacetime to another frame that moves at a constant velocity relative to the former. The transformations are named after the Dutch physicist Hendrik Lorentz.
What means time like?
(physics) (of the interval between two events in spacetime) Having overlapping light cones, so that information can pass from one to the other, and one can be envisaged as a cause of the other.
What is a timelike vector?
A timelike vector connects two events that are causally connected, that is the second event is in the light cone of the first event. Seen like that the two vectors define a time interval or a length on the appropriate inertial frame, as Vladimir said.
What do you mean by four-vector?
In special relativity, a four-vector (also known as a 4-vector) is an object with four components, which transform in a specific way under Lorentz transformation.
How do you prove something is a 4 vector?
There is a natural frame to pick: the rest frame of a fluid element. You give to ja the components (ρ0c,0,0,0) in that frame where ρ0 is proper density. Then you announce it is a 4-vector.
What are the four-vector quantities?
For example, displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars. To qualify as a vector, a quantity having magnitude and direction must also obey certain rules of combination.
What does a unit vector tell us?
These unit vectors are commonly used to indicate direction, with a scalar coefficient providing the magnitude. A vector decomposition can then be written as a sum of unit vectors and scalar coefficients. Given a vector V , one might consider the problem of finding the vector parallel to V with unit length.
What is unit vector and how do we symbolically represent it?
A unit vector is any vector that has a magnitude equal to one. Magnitude is a word that means length of a vector. So, any vector that has a length equal to one is a unit vector. Symbolically, it is written like this: |v| means the magnitude of v.