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julianwitkowski
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Homework Statement
Using the two-dimensional wave interference pattern shown and the two equations involving path difference, complete the following.
i) measure the wavelength of the waves
ii) measure the distance between sources
iii) measure the path distance from each of the sources to the nodal point shown.
* note that this is a diagram I've made... I can't get the image out of the book for you at this moment but it's basically like this with wave interference lines... The dotted lines are obviously my nodal lines and I drew the triangle over it.
Do they just want me to measure this with a protractor and ruler?
For the wave I measured crest to crest...
With S1 being the left source at the bottom, is this what I'm supposed to measure?
iv) show the complete calculation for wavelength
I don't know if this is equation and I'm not sure about the variables.
| PnS1 - PnS2 | = (n - ½) λ
Is this just the absolute value of the line PnS1 - PnS2 or absolute value of Pn ⋅ S1
- Pn ⋅ S2... If it is the later, I understand it less because it seems like coordinates to me.
For the anti nodal point in b) I believe this is the equation.
d sin ϴ = (m + ½) λ = mλ
ϴ = Is this the angle at the point separating S1 and S2?
For...
n = nodal line
m = antinodal line
I don't understand how to get numbers for n and m... I know what nodal and antinodal lines are in the wave interference pattern, but I'm not sure what the variable is a measure of?
b) Choose a point on any anti nodal point and show the complete calculation for wavelength.
Homework Equations
a) | PnS1 - PnS2 | = (n - ½) λ
b) d sin ϴ = m λ = (m + ½) λ
The Attempt at a Solution
i. 8mm
ii. 23mm
iii.PnS1 = 46mm
PnS2 = 63mm
I'm looking for advice on how to tackle the complete wavelength equations.
I also would like to understand the values of nodal and anti nodal variables n and m, that would probably set me straight.
Thanks :)
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