Determine the change in path length

AI Thread Summary
The discussion revolves around calculating the change in path length from two in-phase wave sources separated by 2 cm, with a wavelength of 5 cm, at a point on the second nodal line. Participants express confusion about the question's clarity and the relevant equations needed for the solution. It is clarified that a node occurs when the wavelength difference is nλ/2, with n being odd, and for the second nodal line, n equals 3. Understanding this relationship is crucial for determining the path length difference. The conversation emphasizes the importance of interpreting the interference pattern correctly to solve the problem.
Matthew M
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Homework Statement


A ripple tank is setup and a point selected on the second nodal line. determine the change in path length from two wave sources if they are in phase and separated by 2cm and the wave length is 5cm

Homework Equations


not really sure of what equations to use?

The Attempt at a Solution


Dont understand what this question means?
 
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If you have quoted the question exactly (and there is no diagram) then I agree it's hard to decipher.
But my guess is they are asking for the difference in path lengths from two sources to a point P, given that:
- the sources are in phase and 2cm apart,
- the wavelength from each source is 5cm
- P is on the second nodal line of the interference pattern
 
A node occurs when two waves meet with a wavelength difference of nλ/2 where n is odd. The second nodal line means n = 3. Does this help.
 
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