Recent content by goldilocks

Hello, I am not sure if I am doing this right or not. It seems to simple to be the right aswer, I feel I must have gone wrong somewhere. Many thanks :-) xxx Homework Statement Length Contraction Relativity Question? An aeroplane is of length L’(m) precisely when measured in its rest...

Hello, I would very much appreciate some help getting started with the following problem. As I don't really know where to begin: Show that for a space-ship to travel a distance, D, from Earth so that its “on-board” proper time elapses by, at most, T, the ship’s speed (relative to Earth) must...

Homework Statement Consider a lightwave having a phase velocity of 3 x 10^8 m/s and a frequency of 6 x 10^14 hz. What is the shortest distance along the wave between any two points that have a phase difference of 30 degrees ? What phase shift occurs at a given point in 1 microsecond and...

Homework Statement 2 solar type stars are in a close binary system. Each indivual star has an apparent brightness of m = 10 mag. Determine the apparent magnitudes of the combined system of the 2 stars assuming they cannot be resolved as individual objects. Determine the minimum brightness...