[Phys-L] Re: Announcer photo

[Brian Whatcott <betwys1@SBCGLOBAL.NET>]

At 06:29 AM 4/18/2005, you wrote:
> I like the photo on the Spring, 2005 "Announcer" showing the Bonneville
> Salt Flats. The horizontal distance in the photo is 7.5 miles, and the
> horizon looks curved. Inside the front cover, it asks if the curvature due
> to the earth's shape or a distortion caused by the camera lens. Anybody
> know?

The locus of the base of a vertical cone on a sphere is a horizontal circle.
If one exaggerates this horizon line, by using a cone of very narrow angle
this would show up as a curve, concave down in a picture.

Brian Whatcott    Altus OK    Eureka!
_______________________________________________
Phys-L mailing list
Phys-L@electron.physics.buffalo.edu
https://www.physics.buffalo.edu/mailman/listinfo/phys-l