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    I'm pretty confident with this stuff just can't figure out this question... I think it's something to do with the angle of diffraction?
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    definitely thought this would be some weird heairdressing thread...
    not that i'd have been in any way interested either way ;D
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    (Original post by Circadian_Rhythm)
    I'm pretty confident with this stuff just can't figure out this question... I think it's something to do with the angle of diffraction?
    It's only the central fringe where the path difference for the light from both slits is zero for all colours. The other fringes, being to the left or right of the slits (and thus nearer one than the other), create path differences that depend on wavelength.
 
 
 
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