how do you experimentally verify that sini/sinr is a constant.
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Draw two NN (Normal) lines as seen in the figure at points marked 1 and 2. Measure angles i1, r1, i2, and r2 by a protractor. Use i1 and r1 and the Snell s formula to find n, the refraction index of the glass slab. Use i2 and r2to find n again.
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