# Central Maximum of laser light

Hi there.

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?

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

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.

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ideasrule
Homework Helper
The distance between the diffraction slits is just D=2700/100=2.7*10^-5 m. X is the distance between the bright fringes (or between the dark fringes).

Thanks Ideasrule .
Really appreciate it

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