Q. You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}.

Q. A ray of light enters the long side of a 45-90-45 prism and undergoes two total internal reflections, as indicated. The result is a reversal in the ray's direction of propagation. Find out the minimum value of the prism's index of refraction, for these internal reflections to be total.