(Solved): Yellow light of wavelength 590nm passes through a diffraction grating and makes an interference p ...

Yellow light of wavelength $$590\mathrm{nm}$$ passes through a diffraction grating and makes an interference pattern on a screen $$65\mathrm{cm}$$ away. The first bright fringes are $$1.7\mathrm{cm}$$ from the center of the pattern. Part A How many lines per $$\mathrm{mm}$$ does this grating have? 20 lines per $$\mathrm{mm}$$ 40 lines per $$\mathrm{mm}$$ 90 lines per $$\mathrm{mm}$$ 200 lines per $$\mathrm{mm}$$