Page 3 - Lesson note refraction by convex lens

Position of Position of Relative size of the image Nature of
the object the image the image

F 2 and 2F 2 inverted

Real and
At 2F 1 At 2F2 Same size
inverted

Real and
Between F 1 and 2F 1 Beyond 2F 2 Enlarged
inverted

Infinitely large
At focus 2F 1 At infinity or highly Real and
inverted
enlarged

On the same side of
Between F 1 and the lens as the Enlarged Virtual and
optical center O erect
object

Image Formation in Lenses Using Ray Diagrams
o Ray diagram helps us to study the nature, position and relative size of
the image formed by lenses.
o For drawing ray diagrams we first consider how light rays falling on
both concave and convex lens in three different ways get refracted.

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