# Physics

An object, O, is placed 18 cm from the center of a converging lens of focal length, f= 6 cm as shown.
O F F
(a) On the illustration, sketch a ray diagram to locate the image.
(c) Using the lens equations, compute the image distance.
(d) Calculate the Height of the image.

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1. There is no illustration and we don't draw sketches.

I assume you know the lens equation, so use it to do part (c)

1/Do + 1/Di = 1/f

The image is real if Di, the image distance, is positive

For (d), the magnification is Do/Di

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