(Done this part) Explain why there is no diffracted beam between the two observed beams. Assuming the low-angle diffracted beam is the first order beam, calculate the number of lines per mm on the grating. When used in a spectrometer to view light of wavelength 430 nm, diffracted beams are observed at angles of 14 degrees 55' and 50 degrees 40' to the zero order beam. I'm not even clear on what this question is asking, the difference between the 2 angles of diffraction for the 1st and 2nd order beam? And should I just take 583 nm as the wavelength in the calculation? 2) A diffraction grating is designed with a slit width of 0.83 um.
For the highest order, calculate the angle between the two diffracted beams. They're long questions but any help would be much appreciated 1) Light directed normally at a diffraction grating contains wavelengths of 580 and 586 nm only. What is the order number for the beam at 50 degrees 40'? Worked out the order is 3 but that means order 2 is missing and I have no idea why
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