Photon

Car

The state of a system

It is often convenient to distinguish between an object and the state of that object. The state of an object is a full description of all its properties. Click on the examples below.

Stationary at lattitude: 53 N, longitude: 1.28 W.

Driving

Back

Crashed

Stationary

The state of a car:

Driving at 70 mph in North-East direction.

Left

Right

Beam Splitter

Down

The state of a photon: