Accurate construction of ray diagrams

Accurate construction of ray diagrams

Earlier in this chapter we mentioned that only rays parallel and close to the principal axis are brought to a true point focus. If we are to have an undistorted image the same condition of closeness to the axis applies to all rays forming the image. Nevertheless,
we can locate an image accurately, using rays drawn well away from the axis, provided we represent the spherical mirror by a straight instead of a curved line.

Accurate construction of ray diagrams
Accurate construction of ray diagrams
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