Spaceship A is traveling at 0.3c, and spaceship B is traveling at 0.4 c. Spaceship A sends a signal of frequency 1000 Hz. What frequency does spaceship B detect?
I had this on my final yesterday. This is what I tried:
I solved for their relative speed to each other, finding it to be 0.8c (I think, I can't quite remember, and I don't have my calculator nearby). Then I think I just plug that number into the relativistic Doppler effect equation. Can someone let me know how to solve this problem, or if I am correct. Thanks!
2007-12-20 07:00:27 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
I hope you got .625c, not .8c for the relative velocities. Otherwise you did it right.
f = f' * sqr (1+.625/1-.625)
Frequency should be blue shifted to about 2082 Hz.
You can also solve this separately by getting calculating the frequency to you as observer, then doing the same thing to the other space ship. I.e.,
frequency * sqr (1+.4/1-.4) *sqr (1+.3/1-.3)
2007-12-20 09:32:32 · answer #1 · answered by Frst Grade Rocks! Ω 7 · 2⤊ 0⤋
C the impressive concern is for gentle to be measured on an identical velocity in spite of your place relative to a different - then much extra basic issues like area and time might desire to be relative! count distorts spacetime. inspite of the undeniable fact that, all the solutions you're searching for are interior the particular concept so study up on that.
2016-12-18 05:45:08 · answer #2 · answered by ? 4 · 0⤊ 0⤋