aring both sides, we get 2Bxy B2x2 2o T>2 . 2Q y2 — cos B i -rj cos2 B = BZ sin- /? B2x2 . sin2 jS y._^co./, + ^.,=B.A,./l x2 2xy x zxy . v A- ABt°S3+iF=Sin^ (U) Equation (11), represents an ellipse, except when sin 8 =0, that is, when the phase ditference 8 is either 0 or it. If8 = 0, cos g =… … Figure 94 Figure 91 shows a number of typical shapes that the pathcan take according to the value of 8. In each case, the whole 192 LIGHT motion must lie within the rectangle of the dimensions 2A X215, for evidently x cannot be greater than -f A nor less than—-A. and y cannot be greater than +B nor…
Light
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