(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two first-order spectrum lines are measured by a 9650line/cm spectroscope at angles, on each side of the center, of +26*38', +41*02' and -26*18', -40*27'. Calculate the wavelengths based on these data.

2. Relevant equations

[tex]\lambda[/tex]= (d/m)sin([tex]\theta[/tex])

3. The attempt at a solution

i know how to solve similar problems... nothing complicated. but i'm confused how there are only two different spectrum lines in this problem that can be seen with different angles on either side... i thought the incident ray would be oriented at 0 and would then be diffracted by the slits an equal amount up and down. IE if a ray diffracts so you see it at 30*, how could it not be -30*, in the downward direction? or would i for some reason use something like [tex]\Delta\theta[/tex] and use the difference between two rays?

Thank you!

-Zach

edit...

Or is possible that there is some kind of error that the book (Physics for Scientists and Engineers, Giancoli 4th) would want to you take into account for and just count the similar opposite numbers as statistically equivalent?

or could it be a continuous spectrum from +26*38' to +41*02' and then another from -26*18' to -40*27'?

just brainstorming here... really at a loss, any input is greatly appreciated

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# Homework Help: Simple Spectrometer and Spectroscopy Question

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