CBSE Class 10 Science 2017 · Paper 31/3 · Question 4
An object is placed at a distance of 15 cm from a concave lens of focal length 30 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.
Answer
The image is virtual, erect, diminished to two-thirds, and formed 10 cm from the lens on the object's side.
Four characteristics of the image:
Nature: virtual.
Orientation: erect.
Size: diminished, two-thirds of the size of the object ().
Position: cm from the lens on the same side as the object ( cm), between the optical centre and the focus .
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