Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 355
will be how many times tlie area of the board? Then the lightintercepted by the board will illuminate how much of the surface ofthe screen if the board is withdrawn? 4. Give a reason for the law of Inverse Squares. 6. To what besides light has this law been found applicable? 6. The two sides of a… … LII. VISUAL ANGLE, ETC. § 285. Visual angle. — Experiment. Irick a pin-hole in acard, pLK-e an eye near the hole, and look at a pin about 20« distant.Then bring the pin slowly toward the eye. What do you observe? Why is this ? We see an object by means of its image formedon the retina of the eye,…
Physics
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
