Final answer:
In the negative mass Schwarzschild metric, there is no event horizon because the radius of the event horizon is determined using the equation Rs = 2GM, and since negative mass is not physically possible, there is no meaningful radius that can be calculated.
Step-by-step explanation:
In the negative mass Schwarzschild metric, there is no event horizon because the radius of the event horizon, also known as the Schwarzschild radius, is determined using the equation Rs = 2GM.
The Schwarzschild radius depends on the mass of the body, and since negative mass is not physically possible, there is no meaningful radius that can be calculated.
As a result, there is no event horizon in the negative mass Schwarzschild metric.