Question

converging lens has a focal length of 15cm. If an object is placed 10cm from optical centre of the lens, the characteristics of the image formed will be:

A. Real, inverted and diminished
B. Real,inverted and of the same size as the object
C. Real,inverted and enlarged
D. Virtual,upright and enlarged​

Answer 1

Virtual , upright and enlarged image.

• Converging lens means convex lens. It has focal length of 15 cm.

• Now, it has been placed 10 cm from optical centre. So, object distance is 10 cm.

So, we can say : OBJECT IS PLACED BETWEEN FOCUS AND OPTICAL CENTRE.

• Whenever an object is kept so close (i.e. u < f) to a convex lens, a virtual, erect and magnified image is produced.

• Try to remember the ray diagrams, they do help in these MCQs !

$\star$ Hope It Helps.

Answer 2

Virtual , upright and enlarged image.

Converging lens means convex lens. It has focal length of 15 cm.

Now, it has been placed 10 cm from optical centre. So, object distance is 10 cm.

So, we can say : OBJECT IS PLACED BETWEEN FOCUS AND OPTICAL CENTRE.

Whenever an object is kept so close (i.e. u < f) to a convex lens, a virtual, erect and magnified image is produced.

Try to remember the ray diagrams, they do help in these MCQs !