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Diagram of a concave mirror optical setup with an object, distances, and labels.

Diagram of a concave mirror optical setup with an object, distances, and labels.
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The point of this problem is to give you some additional practice in constructing the images produced by mirrors by tracing rays. (a) Take a blank sheet of paper, and orient it in “landscape mode”. Draw a horizontal line that bisects the paper. This line will be your optical axis. Near the right edge of the paper, draw a large concave mirror facing left that is oriented perpendicularly to the optical axis and placed such that the optical axis intersects the center of the mirror. (b) Suppose that this mirror has a focal length of 3 cm. This means that the focal point of the mirror will be 3 cm to the left of the mirror, and will be on the mirror’s optical axis. Place a distinct dot at the mirror’s focal point. (c) We now need to include an object in our drawing. Let our object be an upward pointing arrow of height 6 cm that has its bottom on the optical axis. This means that its tip is 6 cm above the optical axis. Draw this object 12 cm to the left of the mirror (and hence 9 cm to the left of the focal point). After you have drawn your object arrow, label it “object”. 3 See more

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