Light wave incident on and passing through a thin soap film

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SUMMARY

The discussion centers on calculating the thickness of a thin soap film using the equations thickness = (m)(lambda)/(2nf) and thickness = (m+1/2)(lambda)/(2nf). The participants emphasize the importance of providing the correct values for wavelength and refractive index, as well as ensuring the answer is presented to two significant digits. Additionally, the units of thickness (d) are clarified to be multiples of lambda, highlighting the need for precision in calculations.

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here is the problem. i got 0.5 from the fact that thickness = (m)(lambda)/(2nf)

other equation for thickness is thickness = (m+1/2)(lambda)/(2nf)
 
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It seems that you have value for the wavelength and or refractive index? Note also that they want the answer to two significant digits where you only supplied one. What are the units of d? Is it multiples of lambda? I notice that there is a lambda to the right of the answer?
 
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