Pre-class Exercise #14

A boxcar travels by you at relativistic speed as shown in the animation (position is given in meters and time is given in seconds). Inside the boxcar is a woman with a laser that she turns on as she passes you. The laser light travels through the back of the boxcar. What is the velocity of the laser light that the woman in the boxcar measures, vw, compared to the velocity of the laser light that you measure trackside, vT?  Start.


  Your Name:

  Your Answer:

  A. vw = vT = c.

  B. vw = 1.33c and vT = c.

  C. vw = c and vT = 0.66c.

  D. None of the Above.

This Physlet was created by Mario Belloni and Wolfgang Christian.