Part A
You want to create a spotlight that will shine a bright beam of light with all of the light rays parallel to each other. You have a large concave spherical mirror and a small lightbulb. Where
should you place the lightbulb?
At any, point, because all rays bouncing off the mirror will be parallel.
At the radius of curvature of the mirror.
At the focal point of the mirror.
None of the above; you can't make parallel rays with a concave mirror.
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