A rebel starship is chasing an Empire cruiser and is catching up to it at 0.38c.

Question

A rebel starship is chasing an Empire cruiser and is catching up to it at 0.38c. When it appears to be in range the rebel starship illuminates the cruiser with its laser rangefinder to determine the distance between them. The rebel starship then fires an antimatter missile that is moving at a speed of 0.54c in relation to the rebel starship. What speed does the cruiser measure for:     

a. the laser beam as it approaches the Empire cruiser?

b. the missile as it approaches the Empire cruiser?

Please show your work as to how you got your answers to receive points. Thank you!

Explanation / Answer

a).38c+c=1.38c

b)Cruiser measures (.38+.54)c=.92c

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