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Two monochromatic (wavelength = a/5) and coherent sources of electromagnetic waves are placed on the x-axis at the points (2a,0) and (-a,0). A detector moves in a circle of radius R(gtgt2a) whose centre is at the origin. The number of maxima detected during one circular revolution by the detector are |
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Answer» 60  `|Deltax| = 15`, THEREFORE MAXIMA At points R and S `Deltax=0`, therefore maxima. Between P and R (and similarly in other three QUADRANTS), we will get 14 maxima corresponding to, `Deltax = lambda, 2lambda ...... 14lambda`. Therefore, total MAXIMAS are 60. |
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