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i solved most of this question, but am not sure about the last part and i was hoping someone would help me.

As part of a laser light show a technician is adjusting a diffraction grating. A green laser with a wavelength of 532 nm is shone on a diffraction grating with 2700 lines/cm. The screen is 35 m from the diffraction grating.

a. What is the distance between the slits of the diffraction grating?

a. How far from the central maximum will the bright fringe be?Given:

Wavelength = 5.32*10-7 m

D=2700/100 = 2.7*10-5 m

L=35

N=1

Analysis:

Wavelength = xd/nl

X= (wavelength)(nl) / d

X= 1.69 *10-1 m

The distance between the slits of the diffraction grating is 1.69*10-1cm

But i don't know how to caluclate the distance between the central maximum and bright fringe.. and i was hopeing somone would explain how to me.