Modern Physics: Special Relativity All of these are part of one question; a) Sam once again...

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?

Expert Solution

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

genius_generous answered 2 years ago

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