Qualification > Sciences
Physics CIE help
astarmathsandphysics:
C - for destructive interference the path difference must be a whole number of wavelengths plus an extra half wavelength
halosh92:
--- Quote from: astarmathsandphysics on April 12, 2010, 11:13:27 pm ---C - for destructive interference the path difference must be a whole number of wavelengths plus an extra half wavelength
--- End quote ---
could you explain this furthur please?
Amr Fouad:
--- Quote from: halosh92 on April 13, 2010, 07:24:12 am --- could you explain this furthur please?
--- End quote ---
constructive interference- happens when waves are in phase...and so the path difference is a multiple of ?...
equation for path diff of constructive: n?, where n=1, 2,3....
destructive interference: happens when waves are out of phase, and so the path difference is a multiple of half ?
equation for path diff of destructive= (0.5+n)?
therefore the only possible answer is C...
got it?
sweetie:
hey ppl,
when a graph line is sloping downwards, it has a neg. gradient so if we had to cal. the value of the gradient will it be written as " -x" or " x"???????
halosh92:
--- Quote from: ~ A.F ~ on April 13, 2010, 07:44:36 am ---constructive interference- happens when waves are in phase...and so the path difference is a multiple of ?...
equation for path diff of constructive: n?, where n=1, 2,3....
destructive interference: happens when waves are out of phase, and so the path difference is a multiple of half ?
equation for path diff of destructive= (0.5+n)?
therefore the only possible answer is C...
got it?
--- End quote ---
thx alot...but wats the "?" in ure explanation?
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