Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 349
the flame ; it is ableto see not only the flame, butevery point of the flame ; henceevery point of the flame must emitlight in every direction. Everypoint of a luminous body is an in-dependent source of light and emitslight in every direction. Such apoint is called a luminous point. In Figure 230… … IMAGES FORMED. 32T § 282. Images formed through small apertures, — Ex-periment.—Cut a hole about 8«n square in one side of a box; covertlie hole with tin-foil, and prick a hole in the foil with a pin. Place theliox in a darkened room, and a candle flame in the box near to the pin-hole. Hold an…
Physics
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