I am in need of a formula. (visible wavelength, thin film)

AI Thread Summary
The discussion revolves around the formula for thin film interference, specifically 2nt = (m[+.5])λ. The user seeks clarification on what value to use for m to achieve the minimum index, questioning whether to use m=1 and whether to include the [+.5] for destructive or constructive interference. It is noted that m should be the smallest integer that keeps the right-hand side of the equation positive. The conversation emphasizes understanding the conditions for constructive versus destructive interference in thin films. Overall, the focus is on applying the correct values in the formula for accurate results.
bobbo7410
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If anyone could help me out it would be greatly appreciated.

2nt = (m[+.5])\lambda
 
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What's the problem? You seem to have the right equation on hand.
 
o yea sorry, the further question was;

what would I use for m to achieve the minimum index? 1?

As well, would I use the [+.5] or not, meaning destructive vs constructive.

Those 2 were my detailed questions.
 
anyone?
 
M would have to be the smallest possible integer without the right-hand-side being less than or equal to 0.
 

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