So for the first question we let,
V_a = velocity of spacship = 0.8c
V_b = velocity of the light passing you = c
Now, just plug it in:
$\displaystyle
v = \frac {c^2(V_a + V_b)}{c^2 + (V_a)(V_b)}
$
$\displaystyle v = \frac {c^2 (c + 0.8 c)}{c^2 + (0.8c)(c)}$
$\displaystyle v = \frac { 1.8c^3}{1.8c^2}$
$\displaystyle \boxed {v = c}$-----(E).
__________________
"Dissent is the highest form of patriotism." - Thomas Jefferson.
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I study Mathematical Physics at the
University of Waterloo.
-DC
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Last edited by Deco; Aug 16th 2009 at 09:41 AM.
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