Question

The numberof wavelength per cm is called​

Answer 1

Answer:spectroscopic wavenumber

Explanation:

Answer 2

The frequency, symbolized by the Greek letter nu (ν), of any wave equals the speed of light, c, divided by the wavelength λ: thus ν = c/λ. ... This number is called the wave number of the spectrum line. Wave numbers are usually measured in units of reciprocal metres (1/m, or m-1) and reciprocal centimetres (1/cm, or cm-1).