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← ScienceWhich risk increases when an interstellar spacecraft's velocity approaches relativistic speeds?
A)Increased micrometeoroid impact frequency✓
B)Internal electronics overheat rapidly
C)Fuel cell efficiency declines
D)Structural integrity loss
💡 Explanation
An increase in speed increases micrometeoroid impact frequency, due to relativistic effects compressing spacetime in the direction of travel. Because of length contraction, the spacecraft experiences a higher flux of particles along its path, therefore micrometeoroid risks escalate, rather than internal malfunctions, because other systems don't interact directly.
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