What should be the angle to the first spot measured off axis

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Reference no: EM13981573

1. You have a laser with wavelength = 640.5[nm]. The grating has a slit spacing of 1.677E-03[mm]. What is the angle measured for n=1

(I used " d sin theta = m wavelength and got 0.382 in radin and got it wrong)

2. You measure a distance from diffraction to screen to be 310[mm]. What should be the angle to the first spot measured off axis, if the distance from the center spot is 1.281E+02[mm].

(I got 0.413 in radin and got it wrong)

3. For this question your laser has a wavelength of 640.5[nm]. You measure a distance from diffraction grating to screen to be 310[mm] and the first spot is measured a distance from center axis to be 1.281E+02[mm]. How many slits per millimeter are there? answer fo the nearest integer slit.

( I used y/L=m(wavelength)/d and got 645, but it was wrong)

Reference no: EM13981573

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