# +1 order efficiency in a blazed transmission grating

## Homework Statement

I have a blazed transmission-grating with a known blaze-angle θB and refractive index n. Is there a way (as with a blazed reflection-grating) to calculate at what incident angle maximum efficiency will be achieved for the m'th order diffraction given a wavelength?

Edit: Of course the N of grooves/mm is also known.

Thank you

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