# Transformations of Relativistic Temperature: Planck-Einstein, Ott, Landsberg, and Doppler Formulas

Transformations of Relativistic Temperature: Planck-Einstein, Ott, Landsberg, and Doppler Formulas

This Demonstration illustrates spacetime velocity vectors representing internal energy currents and their equilibration for a system of two relativistic thermodynamic bodies in 1+1 dimensions. The velocities of the two bodies are =

and =

in units with . The corresponding spacelike internal energy current vectors are =

and =

. The equilibration vectors are the sums =+ for . In thermal equilibrium their directions become parallel.

a

u

1

1 |

0 |

a

u

2

1

1-

2

v

1 |

v |

c=1

a

w

1

w

1

0 |

1 |

a

w

2

w

2

1-

2

v

v |

1 |

g

i

u

i

w

i

i=1,2