Two spaceships are approaching one another, one with speed v1 and the other with speed v2 . Neither speed is 0 . Their speed of approach, according to Newtonian mechanics, is v1 + v2 . Special relativity tells us that the speed of approach

a. is more than the Newtonian value if each speed is more than half the speed of light.
b. is always greater than the Newtonian value.
c. is the same as the Newtonian value if each speed is less than half the speed of light.
d. is always less than the Newtonian value.


d

Physics & Space Science

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