Chapter 40: Special Relativity Conceptual problems 40.C.3 Spaceship A and spaces

Question

Chapter 40: Special Relativity Conceptual problems 40.C.3 Spaceship A and spaceship B are racing toward an airless (5.00) moon at speeds of 0.15c and 0.85c, respectively. They each fire a pulsed laser as a signaling device, and the speed of each of the pulses is measured on the moon. (a) What is the speed of the pulse received from spaceship A? (b) What is the speed of the pulse received from spaceship B? (a) O0.15c O 0.85c O 1.00c (0/1 submissions used) (b) O 0.15c O 0.85c O 1.00c (0/1 submissions used) Save 40.C.3 Submit 40.C.3

Explanation / Answer

40.C.3:

A . since speed of pulsed laser is equal to speed of light there for at there for  speed of the pulse received from spaceship A is 1.00C

B since speed of pulsed laser is equal to speed of light there for at there for  speed of the pulse received from spaceship B is 1.00C

P 40.12.1:

L = Lp * sqrt [1 - v2/c2]

L = 491 * sqrt [1 - (2.6 * 108)2/(3 * 108)2]

L= 244.95 m

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