Mention how Ausable was always one step ahead of everyone.
(The Midnight Visitor)
The given figure shows image formation by a lens. Analyse the figure and answer the following questions : 
What is the type of lens used for image formation in the given ray diagram ?
If the real image is formed at a distance of \( 30 \text{ cm} \) from the lens and the size of image is twice the size of the object, then where was the object placed ?
