Apparent and actual radius (Optics)

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    Optics Radius
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SUMMARY

The discussion focuses on the relationship between the apparent radius of a circle and its actual radius as it is photographed at varying distances from the camera. The key concept identified is linear magnification, also known as transverse magnification, which describes how the size of an object appears to change based on its distance from the lens. The provided resource from HyperPhysics offers further insights into this optical principle.

PREREQUISITES
  • Understanding of basic optics principles
  • Familiarity with linear magnification concepts
  • Knowledge of camera distance measurement techniques
  • Basic geometry related to circles
NEXT STEPS
  • Research linear magnification formulas and calculations
  • Explore the HyperPhysics resource on lens detection
  • Investigate the effects of distance on image size in photography
  • Learn about the relationship between focal length and magnification
USEFUL FOR

Photographers, optics students, and anyone interested in understanding how distance affects the perceived size of objects in images.

Healthycola
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I know the radius of a circle. I'm taking pictures of the circle as I bring it closer to the camera. Obviously the radius is getting larger. I want to know what the relationship is to find this out? I know the distance from the camera that the circle is at all times.
 
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