Question

What will be the wave number of radiation having wavelength 5000A

Answer 1

Answer:

Given:

Wavelength (λ) = 5000 Å

To Find:

Wave Number (v)

Solution:

We know that,

Mathematically,

We are asked to find Wave Number (v)

Given that,

λ = 5000 Å

Therefore,

Substituting the above value in the given formula  

We get,

Since, Å = 10⁻¹⁰ m

Or

Hence

Wave number of radiation having wavelength 5000 angstrom is 2000000 m⁻¹

Or

2 x 10⁶ m⁻¹