Very Short Answer Type Questions

Name the lens which can concentrate sun's rays to a point and burn a hole in a piece of paper.

(Choose from: Convex lens, Concave lens)

Name the point inside a lens through which the light passes undeviated.

A $1 \mathrm{cm}$ high object is placed at a distance of $2 f$ from a convex lens. What is the height (in $\mathrm{cm}$) of the image formed?

If the image formed by a convex lens is of the same size as that of the object, what is the position of the image with respect to the lens?
(Choose from: $O, f, 2f$)

If an object is placed at the focus of a convex lens, where is the image formed? 

Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.

Parallel rays of light are refracted by a convex lens to a point called the _____ (centre of curvature / principal focus).

The image in a convex lens depends upon the distance of the _____ from the lens.