The difference in the number of wavelengths, when yellow light propagates through air and vacuum columns of the same thickness, is one. The thickness of the air column is Refractive index of air _c=1.0003 , Wavelength of yellow light in vacuum =6000 Ã…

Step-by-step solution

Difference in the number of wavelength =1 . If ' L ' is the thickness of air and vacuum columns. aligned & L _ st - L _ man =1 & L ( 1 _m - 1 _ n m )=1 & L ( 1 _ m = _ m - 1 _ van )=1 & L ( _ - _ man - 1 _ man )=1 & L _ eme ( _ N -1 )=1 & L 6000 10⁻¹⁰ (1.0003-1)=1 & L= 6000 10⁻²⁰ 0.0003 = 6 10⁻⁷ 3 10⁻⁴ & =2 10⁻² ~m =2 ~mm & aligned