Which efficiency limit occurs when a Carnot engine operates between a fusion reactor's 1.5x10^8 K plasma and a spacecraft's 300 K radiator?

💡 Explanation

A Carnot engine's efficiency is limited by the temperature differential using the Carnot efficiency equation. Because efficiency = 1 - (T_cold/T_hot), therefore, with such a high ratio from 300/1.5x10^8, the efficiency approaches 100% rather than being constrained, regardless of component failure.

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