Two convex lense are given in the figure A and figure B.Which has more power

Two convex lense are given in the figure A and figure B.which lens has less focal length

Two convex lense are given in the figure A and figure B.Can these lenses act as diverging lenses in any condition?

Explain the defect in figure B.

The magnifying power of a telescope depends on the focal length of the objective and that of the eye- piece. Data of some lenses are given in the table. Choose any two lenses which are to be preferred as objective and eye-piece to construct a telescope. Give reason for your selection.

Results of a famous experiment is given in the figure. Which properly of the DNA is proved by this experiment?.