What is the difference between a a law and principle ?

Answer 1

A law has been proven experimentally

Answer 2

Law :

Law is a set of rules or norms of conduct which forbid, permit or mandate specified actions and relationships among people and organizations. The authority upon which legal rules rest and the extent to which they are formally codified varies between jurisdictions but all legal systems are united in their attempt to ensure impartial treatment of those suspected of breaking the rules and to bring about justice. The word law derives from the late Old English lagu of probable North Germanic origin.

Principle :

A principle (not principal) is something, usually a rule or norm, that is part of the basis for something else. For example, the ethics of someone may be seen as a set of principles that the individual obeys. These principles form the basis for their ethics.

Principles may also be introduced as pedagogy: laying down basics in a topic, in order later to proceed to more detailed developments.

Identifying or defining a rule as a principle says that, for the purpose at hand, the principle will not be questioned or further derived. This is a convenient way of reducing the complexity of an argumentation.

Hope you like this.