Gilbert light experiments for boys . Fig. 104. You get a picture Experiment No. 63. Your ownimage. Look atyourself in the con-cave mirror. Areyou upside down andsmall? Bring youreye closer to themirror than the focus(2 inches) (Fig. 105).Is your eye largeand right side up? Look at yourself in the convex side. Areyou small and right side up in all cases? THE WHY OF THE CURVED MIRRORSWaves. When parallel waves (1), Fig. 106, strike the con-cave side of the mirror, they are reflected and so curved in thatthey converge at the focus and then diverge. When parallel waves strike the convex side (2),
Gilbert light experiments for boys . Fig. 104. You get a picture Experiment No. 63. Your ownimage. Look atyourself in the con-cave mirror. Areyou upside down andsmall? Bring youreye closer to themirror than the focus(2 inches) (Fig. 105).Is your eye largeand right side up? Look at yourself in the convex side. Areyou small and right side up in all cases? THE WHY OF THE CURVED MIRRORSWaves. When parallel waves (1), Fig. 106, strike the con-cave side of the mirror, they are reflected and so curved in thatthey converge at the focus and then diverge. When parallel waves strike the convex side (2), they arereflected and so curved out that they diverge and never meet. Rays. The curvedmirror is part of asphere and the cen-ter of the sphere isat. C, Fig. 107(1). Thelines CA are radii ofthe sphere and theyare perpendicular tothe mirror. When par-allel rays strike theconcave mirror theymake equal angles with these perpendic- Fig. 105, Your eye is enlarged. GILBERT LIGHT EXPERIMENTS 69
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
