Question

plzzz tell in explanation plzzz in full explanation​

Answer 1

The frequency of the light wave is

 period1=2.0×10−10s1=5×109/s.

(ii) The wavelength of light wave is

 

νc=5×109/s3×108m/s=6.0×10−2m.

(iii) The wave number of light wave is 

νˉ=λ1=6.0×10−21=16.66/m.

So we have frequency 5×109/a

wavelength =6.0×10^-2m

wave number = 16.66/m