4 ms·
No. If: V(a)=0.75c (relative to observer at (c)) and V(b)=0.75c (relative to observer at (c)) and (a) and (b) appear to be on parallel and oppositely signed
by sageikosa 14y ago
No.
If:
V(a)=0.75c (relative to observer at (c))
and
V(b)=0.75c (relative to observer at (c))
and (a) and (b) appear to be on parallel and oppositely signed vectors from (c)'s vantage point, the observed velocity of (b) @ (a), or (a) @ (b) will not equal 1.5c.