Question

An object is placed at a distance of 60cm from a convex lens of focal length 30cm. If height of object is 4cm, then calculate the position and nature of image. Also draw a ray diagram of above situation.​

Answer 1

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In this question I am going to use a scale of 1:5 to draw this diagram.

When I use this scale:

Focal length =20/5=4cm

Object height =4/5=0.8cm

The object distance =30/5 =6cm.

From the diagram, the image height is 1.6cm.

Which from the scale is : 1.6 × 5=8cm

The ratio of image size to object size is : 8:4=2:1

The ratio= 2:1

Find diagram in the image.