The regions of electromagnetic spectrum given in terms of wave length for Microwave, Visible and Mid. IR spectroscopy are given respectively by
1
1 – 100 mm, 2.5 – 50 μm and 380 – 780 nm
2
2.5 – 50 μm, 1 – 100 mm and 380 – 780 nm
3
380 – 780 nm, 2.5 – 50 μm and 1 – 100 mm
4
1 – 100 mm, 380 – 780 nm and 2.5 – 50 μm