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[Physics Derivation] n(lamda) = dSin(theta)

Cokehead Mother · 2008-02-15 11:53:23

Let's say this came up in the exam. Could someone please be so kind as to post up what would be required to get full marks? My book doesn't really have a straight up derivation.

15-02-2008 12:53PM

#1

Cokehead Mother

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Let's say this came up in the exam. Could someone please be so kind as to post up what would be required to get full marks?

My book doesn't really have a straight up derivation.

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#2 15-02-2008 02:43PM

ZorbaTehZ

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Look at this You'd draw that triangle, and show the diffraction holes/diffraction grating.

When the opposite side of the triangle (of length aSin theta) is equal to the wavelength or some multiple of it, then you get a fringe, ie n[lambda]=aSin theta. And make some reference to constructive interference. Easy as that.

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#3 15-02-2008 10:18PM

Challenged

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Here is the proof:

www.studentxpress.ie/proof1.pdf

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#4 16-02-2008 01:54AM

The Walsho

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Challenged wrote: »

Here is the proof:

www.studentxpress.ie/proof1.pdf

Thanks for that.

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#5 16-02-2008 12:53PM

Cokehead Mother

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Thanks all.

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