The figure below shows a concave mirror with a small object located at the point

Question

The figure below shows a concave mirror with a small object located at the point marked 6. The focal length of the mirror is 4 units on the scale shown.

(a) Draw and label a dot on the diagram to locate the focal point. Drawn an upright arrow to represent the object, and trace rays from its tip to locate the image. Draw a vertical arrow to represent the image. Apply the ray-tracing rules; DO NOT CALCULATE THE IMAGE LOCATION OR SIZE.

(b) Calculate the image distance and the magnification of the object for the mirror when it is at the given position.

Explanation / Answer

m= -v/u=-12/6 = -2

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