The angle of view depends on the ratio between the focal length and the film format.
The exact angle depends on the size of the particles.
The angle of spread depends on the release conditions.
The optimal angle depends upon the knife geometry, the cut speed and many other parameters.
In general, the angle of view depends also on the distortion.
This angle depends on factors such as the shape of the trough wall and its orientation.
The angle 0 depends on the size and distance of the object.
The blade's angle depends on the height of the stick, but is usually positioned around 45 degrees.
The exact angles between the surfaces depend on the application.
That angle depended upon the geometry of the moment, such as which way the target was heading.