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Write the sign convention for spherical lenses.


PRADEEP KUMAR 7th Dec, 2021
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PRADEEP KUMAR 7th Dec, 2021
  • The optical center of the lens is taken into account for the measurement of all distances. 
  • If distances are measured based on the direction of incident light, they are considered negative. 
  • If distances are measured in the same direction as the incident light, they are considered positive. 
  • If the heights are measured upward and perpendicular to the principal axis, they are considered positive. 
  • If the heights are measured downward and perpendicular to the principal axis, they are considered negative
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