How does Cherenkov radiation work?
Let us examine the evidence carefully. The key is the threshold. In a vacuum, nothing can exceed the speed of light. But in a medium like water or glass, light travels slower—at about 75% of its vacuum speed. A charged particle, such as a fast electron, can exceed this reduced speed. When it does, it creates a shock wave of electromagnetic radiation, analogous to a sonic boom from an aircraft exceeding the speed of sound. This radiation is emitted in a cone at a characteristic angle, which depends on the particle's velocity and the medium's refractive index. The blue glow I first observed is the visible part of this spectrum. The threshold velocity is critical: below it, no radiation occurs. This is not a theoretical abstraction; it is a reproducible, measurable effect that I verified with multiple setups.
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