How do they make those projections of dead celebrities and politicians?

Author's Note

Birthdays, accomplishments, any special occasions were, for me, chances to ask for a trip to the science museum. From Phoenix to Albuquerque to Houston and San Antonio, my trips to health and science museums across the southwest are some of the best memories of my childhood. To this day, I still love animatronic dinosaurs and hope one day to own an army of them -- but my favorite up-close exhibits were always the ones that used the Pepper's Ghost illusion to transform my face into something else (an ape's face, usually) with hand-operated lights and mirrored glass. They're scary and funny, and because the physics behind the illusion are so strong, just as visceral and fascinating 20 years later as they were when I was a kid.

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