If we hold a common reading lens (a magnifying lens) in front of a lamp or some other bright object and at some distance from it, and if we hold a sheet of paper vertically at a suitable distance behind the lens, we see depicted on the paper an image of the lamp. This image is inverted and perverted
sheet of paper הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד