Question

The wave number of the light emitted by a certain source is 2 x 10 6 m-1. Then what is the wave length of this light ?​

Answer 1

Answer:

Explanation:

WAVELENGTH = 1/ WAVE NUMBER

                           = 1/( 2× 10^6)

                            = 0.5 ×10^-6

                             = 5×10^-7 M

Answer 2

Answer:

The wavelength, λ, of the emitted light measured is $5\times 10^{-7}m$.

Explanation:

Given,

The wavenumber of the light emitted by a source = $2\times 10^{6}m^{-1}$

The wavelength of the light, λ =?

As we know,

• The wavenumber is the reciprocal of the wavelength.

Therefore,

• Wavenumber = $\frac{1}{\lambda}$
• λ = $\frac{1}{wavenumber}$

After putting the value of the wavenumber in the equation, we get:

• λ = $\frac{1}{2\times 10^{6} }$
• λ = $5\times 10^{-7}m$

Hence, the wavelength of the light, λ = $5\times 10^{-7}m$.