Examples for

# Relativity

Einstein's theory of relativity encompasses both special relativity and general relativity. Together these describe the structure of spacetime including insights into energy, gravitation and time dilation. Wolfram|Alpha includes numerous formulas and tools for calculating the effects of relativistic motion, gravitational distortion and other effects of relativity.

### Special Relativity

Compute the effects of special relativity on length, time and other physical properties.

#### Compute relativistic length contraction:

#### Determine the time dilation felt by probes and satellites:

#### Do relativistic addition of velocities:

#### Determine relativistic aberration:

#### Determine proper velocity:

#### Compute relativistic momentum:

#### Calculate the rest energy of an object:

### General Relativity

Use general relativity to calculate time dilation and the properties of black holes.