In other cases, there is a clear break between the "rainbow" orders. The spacing of ruled lines on a diffraction grating is 1900 nm. The grating is illuminated with a beam of white light containing the 400 nm to 700 nm wavelength range. The angular width of the gap between the first order spectrum and the second order spectrum is closest to:
A) 2.3°
B) 4.3°
C) 6.3°
D) 3.3°
E) 5.3°