Difference between shock wave and shock ?

1. Nov 23, 2011

sam_021

So I know what a shock wave is but whats a shock ?
is it just the front of the shock wave ?

2. Dec 19, 2011

onlinementor

A shock wave is also known as the sound frequency. Shock would be classified as the electromagnetic radiation frequency.

3. Dec 23, 2011

zhermes

You might be confused about your terminology onlinementor; your response isn't correct, and seems to be quite unrelated as-well.

These are (obviously) very related terms. In general, a 'shock' is a contact discontinuity in pressure and/or density of a material. There is often (if not always) a similar discontinuity in temperature, specific energy, entropy etc.
A 'shock wave' is a 'shock' which is propagating along/through the medium---e.g. from an explosion, or non-equilibrium accretion process.

There can be 'standing shocks' in which the shock is stationary; generally this would not be referred to as a shock 'wave' (but the terminology is somewhat loose).