If 550-Nm Light Is Incident Normally on a Diffratction Grating

Multiple Choice

If 550-nm light is incident normally on a diffratction grating and exactly 6 lines are produced. The ruling eparation must be:

A) between 2.75 x10^-7m and 5.50 x10^-7 m
B) between 5.50 x10^-7m and 1.10 x10^-7 m
C) between 3.30 x10^-7and 3.85 x10^-7 m
D) between 3.85 x10^-7m and 4.40 x10^-7 m
E) greater than 4.40 x10^-7 m