« on: Yesterday at 01:50:20 »
As Alan says the field is a mathematical abstraction. What you do is place a test mass (1kg) and measure the force vector acting on that mass, that vector is the field strength (unit gravitational force) at that point (you can do the same with a magnetic field, using a test magnet). In this case you create a map of of gravitational force values for a volume of space.Is that the famous Einstein Field Equation I have heard of?
That’s all a field is. The value of it is that with gravity we can use a simple formula to calculate the field strength at any point between 2 masses, and hence the force between 2 masses.
(if it is I am glad to learn it is simple )