Photon EmitterScience brain teasers require understanding of the physical or biological world and the laws that govern it.
This ad sounded quite intriguing to me until I found out what they were really selling.
"Attention sci-fi addicts and kids of all ages. Now you too can have your very own Photon Emitter Module. Yes, it's true! For only $39.99, you can impress your friends when you show off your Photon Emitter. It's safer than a laser and easy to install in any home. The amazing Photon Emitter Module converts electrons into photons and safely releases them for your viewing pleasure. To get yours, just send $39.99 to ..."
What are they really selling?
HintYou probably already have a dozen or more of these in your home already.
AnswerIt's just a normal light bulb.
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