A laser produces a monochromatic light of wavelength 581.9 nm which falls normally on a diffraction grating. A second order maximum is produced at an angle of 35° measured from the normal to the grating.
Calculate the number of lines per metre on the grating.
Calculate the highest order which is observable.
Calculate the angular separation between the highest order and second order maxima.
When the grating is used with a different monochromatic source, the second order maximum is observed at an angle of 25.7°.
Calculate the wavelength of this second source.
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