Question

the wave length of light having wave number 4000cm is

Answer 1

____________here is ur answer_______
wave number is reciprocal of wavelength
so
wavelength =1/wave number
wavelength=1/4000
wavelength=0.00025cm^_1
wave length=2.5×10^_4cm^_1

Answer 2

Yo

WAVE NUMBER IS RECIPROCAL OF WAVE LENGTH
WavE NUMBER=1÷WAVE LENGTH
WAVE LENGTH=1 ÷ WAVE NUMBER
WAVE LENGTH=1÷40=0.025m

HOPE IT HELP U G❤❤❤