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What's the best device for measuring angles, as an experiment for a fundamental physics lab at the university level? The first experiment in our fundamental physics lab is "Measuring & Measurement errors". Currently we have four devices: - rule (0.5 mm) - Vernier Caliper (0.02 mm) - Micrometer (0.01 mm) - Spherometer

We're seeking for a method/device to find angles with high accuracy. There are some complicated optical devices/methods as in theodolites, but we want it to be economical and freestanding: Something with an obvious physics/mathematics basic for training aims.

mini
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    Theodolites may be a complicated optical instrument, but I doubt that you could find a more accurate independent instrument. Also, what do you consider as economical? Some of the non-electronic versions are under $300. – LDC3 Jan 04 '15 at 19:25
  • Have you considered a sine bar? http://www.chegg.com/homework-help/questions-and-answers/ten-inch-sine-bar-used-measure-angle-workpiece-measurement-set-shown-figure-4-height-gage--q1937431 – DJohnM Jan 04 '15 at 20:09
  • @User58220, It seems a great method! – mini Jan 05 '15 at 15:45

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