Lecture-20 Examples Solutions Sample Problem-1 HW-20-5. (HRW 16-91) Two waves are described by and where y1, y2, and x are in meters and t is in seconds. When these two waves are combined, a traveling wave is produced. What are the (a) amplitude, (b) wave speed, and (c) wavelength of that traveling wave? Solution: 91. Using Eq. 16-50 and splitting the phase difference between the two waves, we have ()'0.60cossin 52006yxtπ⎡⎤=π−π⎢⎥⎣⎦with length in meters and time in seconds (see Eq. 16-55 for comparison). (a) The amplitude is seen to be 0.60cos0.3 30.52m.6π==(b) Since k= 5πand ω= 200π, then (using Eq. 16-12) 40m/s.vk(c) k= 2π/λleads to = 0.40 m.
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HRW, maximum electric field, isotropic point source, magnetic field amplitude, Examples Solutions Sample