REFERENCES
1.
An activity that uses a light bulb as a point source and shows the inverse‐squared relationship can be found at www.cfa.harvard.edu/seuforum/mtu/MTUinversesquare.pdf. Another inverse squared light lab is at www.vernier.com/labequipment/oek_/inverse_square.pdf
2.
R. D. Knight, Physics for Scientists and Engineers (Pearson Addison‐Wesley, New York, 2004), p. 818.
3.
Ref. 2, p. 828.
4.
Richard P. Feynman, Robert B. Leighton, and Matthew Sands, The Feynman Lectures of Physics (Addison‐Wesley, 1965), Vol. II, pp. 12‐10–12‐11. See also K. D. Moler, Optics (University Science Books, Mill Valley, CA 1988), pp. 397–400.
5.
Ref. 2, p. 832.
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© 2011 American Association of Physics Teachers.
2011
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