(The trigonometric identities in Appendix B will be
Chapter 36, Problem 36.74(choose chapter or problem)
(The trigonometric identities in Appendix B will be useful.) Show that at corresponding to point in Fig. 36.5a, the wave is and has amplitude as stated in part (a). (d) Use the result of part (c) to show that if the intensity at point is then the intensity at a point is given by Eq. (36.7).
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