Physics, 03.01.2020 03:31 aide1234564
Suppose that you have a reflection diffraction grating with n= 125 lines per millimeter. light from a sodium lamp passes through the grating and is diffracted onto a distant screen. part a
two visible lines in the sodium spectrum have wavelengths 498\rm nm and 569 \rm nm. what is the angular separation \delta \theta of the first maxima of these spectral linesgenerated by this diffraction grating?
part b
how wide does this grating need to be to allow you to resolvethe two lines 589.00 and 589.59 nanometers, which are a well knownpair of lines for sodium, in the second order (m=2)?
Answers: 3
= 498 nm
= 569 nm
![\Delta \lambda=\lambda_2-\lambda_1\\\Rightarrow \Delta \lambda=589.59-589\\\Rightarrow \Delta \lambda=0.59]\ nm](/tpl/images/0440/7883/93a00.png)
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Suppose that you have a reflection diffraction grating with n= 125 lines per millimeter. light from...
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