我想問點樣由cm-1 轉做µm and nm

288 cm-1 is not a wavelength. It is a wavenumber, which is equal to 1/λ, where λ is the wavelength.

1/λ = 288 cm-1
Wavelength λ = 1/288 = 2.47 x 10-3 cm = (2.47 x 10-3) x 10-3 m = 2.47 x 10-6 m

1 m = 1 x 106 μm
Hence, wavelength λ = (2.47 x 10-6) x (1 x 106) μm = 2.47 μm

1 m = 1 x 109 nm
Hence, wavelength λ = (2.47 x 10-6) x (1 x 109) μm = 2470 nm