Is this the Wavelength? (Diffraction)

AI Thread Summary
The discussion centers on understanding the equation "λ = asin Ѳ" in relation to diffraction and wavelength. The user seeks clarification on identifying the wavelength in a provided diagram, questioning whether the marked section or the green line represents it. There is a mention of path differences leading to cancellation, indicating that the green lines correspond to half a wavelength. The user concludes that the combination of the red and green lines represents a full wavelength. Accurate identification of these elements is crucial for completing their report.
Modrisco
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I've asked this question about 4 times on yahoo but no one seems to have the brains to answer it!

Looking at the diagram:

LA.jpg


Just trying to get a better understand of "λ = asin Ѳ"

I've marked what I think is the wavelength...can someone please advise? as I'm trying to get a report done and I don't want to say the wrong thing!

If that's not the wavelength..is it the green line?

Thank you!
 
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If pairs are cancelling out then the path difference is 1/2 wavelength.
I think the green lines are 1/2wavelength so the red+green is 1wavelength
 

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