Karnataka Secondary Education Examination BoardKarnataka SSLC
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Refraction of Light - Concave Lens

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Topics

description

  • Concave Lens
  • Image Formation by Concave Lenses
  • Use of Concave Lenses

notes

IMAGE FORMATION BY CONCAVE LENS

There are only two possibilities of position of object in the case of a concave lens:

  • Object is at infinity
  • Object is between optical centre, O and infinity

Object is at infinity:

A highly diminished point sized, virtual and erect image is formed when object is at infinity by a concave lens at principal focus F1.

 Image is point sized, highly diminished, virtual and erect.

Object is between optical centre, O and infinity:

A diminished, virtual and erect image is formed between principal focus F1 and optical centre, O; when object is placed between optical centre and infinity of a concave lens.

Image is diminished, virtual and erect.

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