[问答题]
For light consisting of wavelengthy.rb)fd s/9s ls bet7caf fdvn:iut;/* pvx k jw28:ween 400 nm and 700 nm, incident normally on a diffraction grating, for what orders (if any) would there be overlap in the observed spectrum? Does your answer depend on tn2/ xa vuicwdf:87 p jv:fk;t*he slit spacing?
