physics In Young\'s experiment, these two sources corresponded to the two slits

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physics

In Young's experiment, these two sources corresponded to the two slits (hence such phenomena are often called two-slit interference). Under these assumptions, the conditions for constructive and destructive interference are as follows: for constructive interference d sin theta = m lambda (m = 0, plusminus 1, plusminus 2,...), and for destructive interference d sin theta = (m+1/2) lambda (m = 0,plusminus 1, plusminus 2,...), where d is the separation between the two sources, lambda is the wavelength of the light, m is an arbitrary integer, and Which of the following statements explain why the two-source interference equations are not valid for an observer far away from two red LED signal lights? not monochromatic sources incoherent sources observed from a distance similar to or smaller than the separation between the sources 1 only 2 only 3 only 1 and 2 only 1 and 3 only 2 and 3 only all three Why are the two-source interference equations not valid for an observer on a road far away from two neighboring radio towers for different radio stations? sources emit at different frequencies (i.e., not monochromatic sources) incoherent sources observed from a distance similar to or smaller than the separation between the sources 1 only 2 only 3 only 1 and 2 only 1 and 3 only 2 and 3 only all three

Explanation / Answer

2 only

1 and 2 only

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