Re: your mail

[Bernard L Cohen <blc+@pitt.edu>]

On Thu, 28 Jan 1999, Mike Dupray wrote:

> Does anybody know what a steridian look like in cross section?

	--The solid angle of acceptance in steradians is the area of the
detector divided by the square of the distance from the source to the
detector. If the detector is 1 inch square ( 1 square inch in area) and is
situated 3 inches from the source, the solid angle of detection is 1/9
steradians (1 divided by 3-squared).


Bernard L. Cohen
Physics Dept.
University of Pittsburgh
Pittsburgh, PA 15260
Tel: (412)624-9245
Fax: (412)624-9163
e-mail: blc+@pitt.edu


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