find the angular separation between the red hydrogen-alpha spectral line at 656nm and the yellow sodium line at 589nm if the two are observed in third order with a 3500-line/cm grating spectrometer.
maximum equation for multi-slit interference
d=distance between two slits
m=the interger called the order (bright spots)
The Attempt at a Solution
I tried plugging all of my data into the equation above with d as 1/grading but I'm not sure if this is the right way to go about the problem. I'm not even sure if this is the best formula to use but I cant find any other relevant equations