In: Physics
Modern Physics: Special Relativity
All of these are part of one question;
a) Sam once again gets on a spaceship and travels to a planet 13 ly
(light years) away at a speed 0.5c while Alex stays on Earth. How
long does the entire trip take in Sam’s rest frame?
b) In Alex’s?
c) During the return trip, Sam turns on a lamp with a wavelength of
500 nm to send a signal to Alex. What wavelength does Alex
observe?
a) the distance to the planet measured by Sam is
the time taken in Sam's rest frame is
b) Time taken in Alex's frame is
c) the wavelength measured by Alex is