Question
Thu February 09, 2012 By: Vivek Reddy M
 

please explain briefly the difference between angular magnification & linear magnification

Expert Reply
Thu February 09, 2012

Linear Magnification

  • Linear magnification is the ratio of the image to the object using either size or distance (linear magnification = image height/object height = distance to image/distance to object). When calculating, assign a negative value to the image. The resulting magnification will then have a negative or positive value indicating a real or virtual image.



Angular Magnification

  • Microscopes and telescopes produce a virtual image at infinite distance in the eyepiece. Instead of linear magnification, these instruments rely on angular magnification.



Magnification in Microscopes

  • The total magnification of a microscope is determined by the ocular lens magnification multiplied by the objective lens magnification (magnification = ocular lens x objective lens).

Magnification in Telescopes

  • Magnification in telescopes is calculated by dividing the focal length of the objective lens by the focal length of the eyepiece (magnification = telescope focal length/eyepiece focal length).



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