ing the candle so that light may not fall directly on thescreen except through the hole. An inverted picture of thecandle is seen on the screen. Thus let AB (fig. 4) be the candle flame, 0 the hole in thesheet. Rays of light diverge in all directions from any point,such as A, of the candle flame.… … Fig. 4. point passes through the hole and a picture of the flame isthus produced on the screen. The rays cross at the hole andhence the picture is inverted. By varying the position of thescreen it can be shewn from the size and position of thepicture formed that the path of each ray is straight.…
Heat · Light
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