- #1
Const@ntine
- 285
- 18
Hey there! We started Lab III last week, but things are a bit... strange. See, those exercises were written back in the early 1900s,and so they ask us to read from a book that was published around 1890 or so. Naturally, the library has only one copy, and it's open for 2hours per week, so it's not worth the hassle. Anyway, apart from that we have the regular books that the exercises are based on, but they ommit certain stuff,and the Professor of those one or two exercises is one of those "I don't give a damn, that's the book, go search at a thrift shop and find it, but get one question wrong and you're out". So I'm in a bit of a tough spot.
Either way, let's get onto the question itself. In that experiment, we pretty much just studied a Barrier of Refraction with the light-source being Na (Sodium) Steam, and the wavelengths of different colors of certain light-sources, using a Spectrometer. The problem I have is that after taking all the measurements and whatnot, we had to find some stuff through the given equations and write a smalle ssay, and I'm having a bit of trouble understanding why something happens with the former part (BoR).
So, my problem is that using certain equations, and knowing certain data, I have to find the wavelengths of a certain color in two consecutive fringes of confluence. I do that since I know all the data, but my question is: If the color is the same, why do I have a different wavelength in the two different frings? My book doesn't say anything past "at the fringes of confluence it's bright, in the non-confluence parts it's dark, and those go in turns" to give the simplified version.
I could try to post the data and numbers here, but it'd be tough to translate everything, and in the end I think it's just a "theory" question. I thought about it, and the best I could come up with is this:
So, a Barrier of Refraction acts as amix between Difraction and Confluence, right? Taken by themselves, Confluence creates bright and dark spaces on a screen, in turns. A Refraction does the same, but every other bright "spot" fades a bit each time. Put both of them together, and it looks like Confluence, but each "bright light" is now replaced by a series of dark-bright-dark-bright "beams", due to Refraction.
Therefore, at each Fringe of Confluence, the color we tracked, blue, fades bit by bit. And so, it's like we're seeing a "different" color, and thus has a different wavelength. So it's kinda like how Red and Yellow have different wavelengths.
Am I close to anything? Like I said, my book's a bit fuzzy on that (it's a bit difficult for Undergrands I think, it's Serway's 8th Ed. of Physics for Scientists and Engineers), the other book cannot be found and the leaflet with the exercises says even less.
Any help is appreciated!
Either way, let's get onto the question itself. In that experiment, we pretty much just studied a Barrier of Refraction with the light-source being Na (Sodium) Steam, and the wavelengths of different colors of certain light-sources, using a Spectrometer. The problem I have is that after taking all the measurements and whatnot, we had to find some stuff through the given equations and write a smalle ssay, and I'm having a bit of trouble understanding why something happens with the former part (BoR).
So, my problem is that using certain equations, and knowing certain data, I have to find the wavelengths of a certain color in two consecutive fringes of confluence. I do that since I know all the data, but my question is: If the color is the same, why do I have a different wavelength in the two different frings? My book doesn't say anything past "at the fringes of confluence it's bright, in the non-confluence parts it's dark, and those go in turns" to give the simplified version.
I could try to post the data and numbers here, but it'd be tough to translate everything, and in the end I think it's just a "theory" question. I thought about it, and the best I could come up with is this:
So, a Barrier of Refraction acts as amix between Difraction and Confluence, right? Taken by themselves, Confluence creates bright and dark spaces on a screen, in turns. A Refraction does the same, but every other bright "spot" fades a bit each time. Put both of them together, and it looks like Confluence, but each "bright light" is now replaced by a series of dark-bright-dark-bright "beams", due to Refraction.
Therefore, at each Fringe of Confluence, the color we tracked, blue, fades bit by bit. And so, it's like we're seeing a "different" color, and thus has a different wavelength. So it's kinda like how Red and Yellow have different wavelengths.
Am I close to anything? Like I said, my book's a bit fuzzy on that (it's a bit difficult for Undergrands I think, it's Serway's 8th Ed. of Physics for Scientists and Engineers), the other book cannot be found and the leaflet with the exercises says even less.
Any help is appreciated!