How Do Blacklights Make Things Glow?
Join Hank Green as he explains why blacklights make some things glow! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ----------...
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Whether it was at a club, or an amusement park, or a college dorm room, you have probably seen them before: Blacklights, with their eerie purple light that make your buddy’s teeth glow in a really unnerving way, also yours, by the way. And show off every little stain on your white t-shirt. Blacklights can be both fun and useful. But how do they work, and why do they only make certain things light up with that classic radioactive-looking glow? Well, on a basic level, a blacklight is pretty much like any other light source like a spotlight, or even a candle flame: they all emit electromagnetic radiation. But, as you might have noticed, a blacklight doesn’t exactly brighten up a room like a normal lightbulb. That’s because blacklights are designed t...
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Whether it was at a club, or an amusement park, or a college dorm room, you have probably seen them before: Blacklights, with their eerie purple light that make your buddy’s teeth glow in a really unnerving way, also yours, by the way. And show off every little stain on your white t-shirt. Blacklights can be both fun and useful. But how do they work, and why do they only make certain things light up with that classic radioactive-looking glow? Well, on a basic level, a blacklight is pretty much like any other light source like a spotlight, or even a candle flame: they all emit electromagnetic radiation. But, as you might have noticed, a blacklight doesn’t exactly brighten up a room like a normal lightbulb. That’s because blacklights are designed t...
