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toadehep
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the unit of cosmic ray flux is expressed as flux /(m^2.sr.s.GeV), so what does sr stand for?
Thanks.
Thanks.
humanino said:steradian
humanino said:I voted for blechman in the 2009 PF member physics award.![]()
The abbreviation "sr" stands for "steradian", which is a unit of solid angle. In the context of cosmic ray flux units, it refers to the total area of the sky covered by the detector used to measure the flux.
In cosmic ray flux units, "sr" is used as a measure of the solid angle covered by the detector. Since the flux of cosmic rays is measured by counting the number of particles passing through a given area, the solid angle of the detector plays a crucial role in determining the accuracy of the measurement.
"Sr" is a commonly used unit of solid angle in the field of physics, and it is especially useful when dealing with large areas of the sky. It is also a dimensionless unit, making it easier to manipulate in calculations and comparisons.
Yes, "sr" can be converted to other units of solid angle such as square degrees or square arcminutes. The conversion factor depends on the size of the detector and the distance between the detector and the cosmic ray source.
Yes, "sr" is a widely accepted unit of measurement for cosmic ray flux. However, some studies may use other units such as square degrees or square arcminutes, so it is important to check the units being used in a particular study or analysis.