What is the definition of Permitted Light Particles?

Let's dive into the cosmic comedy of 'permitted light particles.' Picture these are like the superheroes of the universe, but instead of powers like telekinesis, they're just our tiny, glowing, electromagnetic messengers zipping around. They're the particles that make up sunlight, stars, and even the glow of your remote control when you're not looking. They're permitted because, well, the universe has a sense of humor and gives 'em a pass to keep things cosmic.

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But here's the unsettling part: "The permitting of these light particles to travel through a black hole's event horizon was so liberating, it might have led to an existential crisis for the cosmic microwave background radiation." Talk about a cosmic punchline that could make even the Big Bang chuckle... or maybe just groan.