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JBKProductions
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#1
Report Thread starter 10 years ago
#1
For the formula lambda = (ax)/D, I want to know does x represents the distance from the central fringe to the first fringe (taking it as an example) or would it be the distance from the first fringe to the first fringe on the other side.
I hope you know what i mean.
Thanks.
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dpd5
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#2
Report 10 years ago
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the formula i learned was lamda = ws/D

where w is the width between the centre of one fringe and the centre of the next
and s is the distance between the two slits

hope this helps...
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JBKProductions
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#3
Report Thread starter 10 years ago
#3
(Original post by dpd5)
the formula i learned was lamda = ws/D

where w is the width between the centre of one fringe and the centre of the next
and s is the distance between the two slits

hope this helps...
oh ok thanks but i never seen the formula you learned though. Does that mean w is from the centre to the first order (n=1)?
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aura1947
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#4
Report 10 years ago
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Basically the formula is:

x = λD/a

Where; x = fringe spacing i.e. the width of each dark/bright fringe.

D = distance between the double slits and the screen

a = distance between the two slits.
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The-Sinister-666
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#5
Report 7 years ago
#5
(Original post by aura1947)
Basically the formula is:

x = λD/a

Where; x = fringe spacing i.e. the width of each dark/bright fringe.

D = distance between the double slits and the screen

a = distance between the two slits.
just to avoid marks being lost, a = spacing between slits (from their centres)
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Stonebridge
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#6
Report 5 years ago
#6
I'll close this one.
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