An object is placed at a distance of 30 cm from a concave lens of focal length 15 cm

CBSE Class 10 CBSE Class 10 Science
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1

An object is placed at a distance of 30 cm from a concave lens of focal length 15 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.

2

We have, u = - 30 cm ⇒ f = -15 cm
Using lens formula, we have

image

Here, characteristics of the image formed by the concave lens are:

  1. Image formed is virtual.
  2. Image is erect.
  3. Image is formed on the same side of the lens as the object.
  4. Diminished image.