You are an observer in a 100-m long spacecraft traveling from the earth to the moon at 0.8c.
(a) What is the proper length of the spacecraft?
(b) For a proper time interval of 1 sec., the relativistic time interval for the spacecraft measured from the earth reference frame would be
(c) Time dilation does not apply to all time-dependent physical and biological processes. T/F?
(d) What is the relativistic length, DL measured from the reference frame of earth?
(e) An APOLLO crew left a flat mirror reflector on the surface of the moon. If the average surface-tosurface distance from the earth to the moon is then how long does it take moonlight to reach earth?
