26 Nov '08 23:56

I am trying to understand the gravitational lens equation and the answer is in radians and I want to convert directly to arc seconds, check my math, see if my logic is correct:

1 radian is the angle described by the radius of any circle over the radius layed out around the circumference. That makes it 360/ 2*PI. or 57 degrees and change. 360 degrees is 1,296,000 arc seconds so if I divide that by 2 PI (6.28....) I come up with 206,264.8062... arc seconds = 1 radian. Then invert that 1/206,264... and I come up with 4.848 E -6 radians = 1 arc second. Is this correct? Thanks.

1 radian is the angle described by the radius of any circle over the radius layed out around the circumference. That makes it 360/ 2*PI. or 57 degrees and change. 360 degrees is 1,296,000 arc seconds so if I divide that by 2 PI (6.28....) I come up with 206,264.8062... arc seconds = 1 radian. Then invert that 1/206,264... and I come up with 4.848 E -6 radians = 1 arc second. Is this correct? Thanks.