Two diffraction gratings, A and B, are located at the similar distance from the observation screens. Light with the same wavelength λ is utilized for each. The separation among adjacent principal maxima for grating A is 2.7cm, and for grating B it is 3.2 cm. Grating A has 1592 lines permeter. How many lines per meter does grating B have? (Hint: The diffraction angles are small enough that the approximation sin (θ) ~ tan(θ) can be utilized.)