David Sang Solutions for Chapter: Light, Exercise 7: Questions

Look at Figure,
. 
How can you tell from the diagram that the image formed by the magnifying glass is a virtual image?

A converging lens has focal length $5 \mathrm{cm}$. An object is placed $3 \mathrm{cm}$ from the centre of the lens, on the principal axis. Draw an accurate ray diagram to represent this.

A converging lens has a focal length $5 \mathrm{cm}$. An object is placed $3 \mathrm{cm}$ from the centre of the lens, on the principal axis. Use your diagram. To determine the distance of the virtual image formed from the lens.