A diffraction grating has 4000 lines/cm. What is the slit separation?( )A．4000 nmB．400 nmC．2500 nmD．250 nm
A diffraction grating has 4000 lines/cm. What is the slit separation?( )
A、4000 nm
B、400 nm
C、2500 nm
D、250 nm
发布时间：2025-10-21 21:46:17
