A technician performs an experiment on a glass slap and finds that the critical angle for total internal reflection at the glass (refractive index n1) air (refractive index n2 = 1) interface is 43 +/- 2 deg. Find n1 and the associated error.

Answer 1

Slap or slab?

Solve
n1*sin43 = n2 sin90
n1 = 1/sin43

For the associated error, use the same formula with angles of 41 and 45 degrees.

Answer 2

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