(a)
(b)
(b)
from the image above:
(form small angles of diffraction)
In the case of normal incidence (i=0):
k=the order of diffraction
Using the 2 formula one obtains:
Replace the numerical values and get the distance between the central maximum and the first order maximum.
Appendix: A zoom for the first part of this image:
4. (12 points) Monochromatic light of wavelength 640 mm is directed at normal incidence through a...
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