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OpenStudy (roberts.spurs19):
Please help! Really Really confused!
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OpenStudy (roberts.spurs19):
Coherent red light of wavelength 6*10^-7 is incident normally on a pair of narrow slits 'S' and 'F'. A pattern of bright and dark lines, called fringes appears close to point 'P' on a distant viewing screen. The distance between the slits and the distant screen is 2.5m and the distance between the 2 slits is 1.2 mm. State a value of the path difference between the light waves from 'S' and 'F' to the screen to produce a dark fringe on the screen. Please explain how to answer the question so I know how to do similar ones in the future! Thank you!
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