Apparatus[ edit ] A page of Willem 's Gravesande 's book Physices Elementa Mathematica with Jan van Musschenbroek's magic lantern projecting a monster. The depicted lantern is one of the oldest known to be preserved and is in the collection of Museum Boerhaave , Leiden The magic lantern used a concave mirror in back of a light source to direct as much of the light as possible through a small rectangular sheet of glass—a "lantern slide"—on which was the image to be projected, and onward into a lens at the front of the apparatus. The lens was adjusted to optimally focus the plane of the slide at the distance of the projection screen, which could be simply a white wall, and it therefore formed an enlarged image of the slide on the screen. Slides[ edit ] Originally the pictures were hand painted on glass slides. Initially figures were rendered with black paint but soon transparent colors were also used.
If you think that interview was “off the cuff you’re in need of some critical thinking skills yourself. That was an entirely scripted interview full of powder puff feel good questions typically thown at idiotic leftists by agenda driven idiotic leftist media entities. I guarantee he practiced the interview in the mirror to accentuate the inflection of his eyebrows to dramatically increase his seemingly critical thinking powers. He’s taking one on one lessons from Jim Acosta