Refer to the following information for the next eight questions.

Measure each of the following distances if a beam of light traveled each path.

Refer to the following information for the next four questions.

Time calculations using t = nd/c where c = 3 x 10^{8} m/sec.

Refer to the following information for the next two questions.

Determine which path (PBS or PCS) requires the least time. If PBS has the least time, construct a normal at B. If PCS has the least time, construct a normal at C. Measure the angles between the top ray (q _{1}) and the bottom ray (q _{2}) with the normal.

Refer to the following information for the next two questions.

Use Snell's Law (n_{1} sin q _{1} = n_{2} sin q _{2}) calculate an experimental value for the index of the second medium and then give a percent error against the accepted value of 1.5.