Answer the following as Always- Sometimes- or Never as appropriate- In.docx

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A mirror with a negative focal length causes an image that appears larger than the object sometimes depending on the distances. A mirror with a positive focal length causes an object to appear larger, smaller, or the same size depending on the distances. Polishing a surface can change the radiation pressure on it from light since a polished surface often reflects light better. Impedance increases when frequency is reduced.

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Answer the following as Always, Sometimes, or Never as appropriate. In the first two cases,
consider both large and small image distances.
1.) A mirror with a negative focal length causes an image that appears larger than the object.
2.) A mirror with a positive focal length causes an object to appear larger than the object.
3.) Polishing a surface can cause the radiation pressure on the surface from a fixed, incident light
source to change.
4.) Impedance increases when the frequency is reduced.
Solution
1) Negative focal length means convex mirror, for which image size may change with respect to
object placement, but is always smaller than object
2) Positive focal length means concave mirror, for which image can be same, larger or smaller
than object.
3) Yes, because a polished surface is often a good reflector.
4) Yes impedance increases when frequency is low

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