Measuring intensity of a shadow

[krateesh]

Is there any relation to find it's strength?
I have got some raw data -
1# it depends on distance of light source of the object

2# how big the luminous object really appears from that place

3# intensity of the luminous object

4# how opaque is the object whose shadow is being formed.

angle of elevation sometimes do also influence.

 

[disregardthat]

By 'intenisty of a shadow', you mean 'how little light that hits the ground which we see as a shadow'?

 

[krateesh]

by it i mean how darker the ground appears i.e how much darker is the shadow.
one more point to be included
#5 intensity/darkness of shadow is not changed by or is independent of the texture of the body.
#6 it also depends on color,and the amount of light emitted or reflected by the body on which shadow is formed.