# Waves

#1
Not sure what to say here. I thought to decrease D and increase S to get a bigger wavelength reading which reduces uncertainty
Last edited by Student 999; 1 month ago
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1 month ago
#2
Decrease the distance between 2 slits and increase the distance of the screen from the slits.
This will ensure the fringe separation is large and this reduces uncertainty in measuring it.
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#3
(Original post by Ethanity007)
Decrease the distance between 2 slits and increase the distance of the screen from the slits.
This will ensure the fringe separation is large and this reduces uncertainty in measuring it.
I see but after collecting measurements of fringe separation how do you go about calculating the wavelength of the light. By drawing up triangles and figuring out the path difference when its anti-phase?
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1 month ago
#4
(Original post by Student 999)
I see but after collecting measurements of fringe separation how do you go about calculating the wavelength of the light. By drawing up triangles and figuring out the path difference when its anti-phase?
Use the double slit formula:

Fringe separation
= (wavelength) x (Distance from slit to screen) / (distance between 2 slits)
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