- #1
tffnyyy
- 2
- 0
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)
Light wave incident on and passing through a thin soap film
AI Thread Summary
The discussion revolves around calculating the thickness of a thin soap film using the equations thickness = (m)(lambda)/(2nf) and thickness = (m+1/2)(lambda)/(2nf). There is a concern regarding the provided values for wavelength and refractive index, which are essential for accurate calculations. The requirement for the answer to be expressed in two significant digits is highlighted, as only one significant digit was given. Additionally, there is a question about the units of thickness and whether it is expressed in multiples of lambda. Accurate calculations and adherence to significant figures are crucial for obtaining the correct thickness of the soap film.
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)
- #2
andrevdh
- 2,126
- 116
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?
Last edited:
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19.
For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
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Let's declare that for the cylinder,
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Force on the hanging mass
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