Question

If wavelength for a wave is `lambda = 6000  Å,` then wave number will be ____________.

Options

• 1.66 x 10⁷ m^-1

• 1.66 x 10⁶ m^-1

• 16.6 x 10⁷ m^-1

• 166 x 10⁸ m^-1

Answer 1

If wavelength for a wave is `lambda = 6000  Å,` then wave number will be 1.66 x 10⁶ m^-1.

Explanation:

`"Wave number" = 1/lambda`

`= 1/(6000 xx 10^-10)`

`= 1.66 xx 10^6  "m"^-1`