How do projectors work?
In: 2
Inside the projector, there is a very small, very bright screen with the inverted image to be projected. That light from that screen goes through the lens and is magnified.
The only real difference is that a flashlight uses a mirror and a projector uses a lens. A flashlight is just projecting a blurry image of a lightbulb, but you could pull that image into focus if you could adjust the mirror.
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