Question

At which location of object in front of concave lens, the image between focus and optical centre is formed ?

Answer 1

Image formation by Concave Lens

Object Location Image Location                 Image Nature

Infinity                      At F2                                                 Virtual and Erect

Beyond Infinity and Zero Between F1 and Optical center Virtual and Erect.

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Answer 2

Image by Concave Lens:

• Irrespective of the position of the object concave lens always produce image which is located in between the focus and the optical centre of the lens.

• The image characteristics are : Image is virtual, erect and diminished.

• See the ray diagram to get a clear picture.

• One paraxial ray undergoes refraction through the lens and gets diverged. Another ray passing through the optical centre goes undeviated.

• These two rays meet to form the image.

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