Draw ray diagrams to show the formation of three times magnified (a) real, and (b) virtual image of an object by a converging lens. Mark the positions of O, F and 2F in each diagram.

The ray diagrams for the formation of three times magnified (a) real, and (b) virtual image of an object by a converging lens are shown below:

``diagram {"xrange": [-1.8, 16.8], "yrange": [-0.6, 5.6], "lines": [{"from": [0.0, 0.0], "to": [5.0, 0.0], "label": "Ray 1"}, {"from": [0.0, 0.0], "to": [2.5, 2.5], "label": "Ray 2"}, {"from": [0.0, 0.0], "to": [0.0, 5.0], "label": "Ray 3"}], "points": [{"x": 0.0, "y": 0.0, "label": "Object"}, {"x": 5.0, "y": 0.0, "label": "Lens"}, {"x": 15.0, "y": 0.0, "label": "Image"}]} ``

In the above diagram, O is the object, F is the focus, and 2F is the centre of curvature of the lens.