A beam of bright red light of wavelength 654 nm passes

Last updated: 6/8/2023

A beam of bright red light of wavelength 654 nm passes through a diffraction grating Enclosing the space beyond the grating is a large semicylindrical screen centered on the grating with its axis parallel to the slits in the grating Fifteen bright spots appear on the screen Find the minimum possible values for the slit separation in the diffraction grating