A 2.0-cm wide diffraction grating has 1000 slits. It is illuminated by light of wavelength 630nm.
What are the angles of the first two diffraction orders?
Diffraction grating formula
Number of slits in the given width 2.0 cm is
Wavelength of light
For the first order of spectrum, ,
Angle of diffraction
For the second order of spectrum, ,
Angle of diffraction
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