Question

the wavelength of an electromagnetic radiation is 400nm.thus,the wave number will be equal to​

Answer 1

Answer:

Thus, wave number is ν~=(400)−1 nm−1=0

please mark me as the brainliest

Answer 2

Answer:

0.0025 nm^-1

Explanation:

The wavenumber of a wave is defined as 1/λ , where λ is the wavelength.

Given,

Wavelength λ = 400 nm = 400×10 ^-9 m

Thus, wavenumber is  

⇒ 1/(400) $nm^{-1}$

 = 0.0025 $nm^{-1}$

Hope this helped you! If so, please mark me the brainliest :)