Question

The wave number of yellow rediation having wavelength $5800\mathring{A}$ is:

• A. $7.24\times {10}^{4}c{m}^{-1}$
• B. $1.724\times {10}^{8}c{m}^{-1}$
• C. $1.924\times {10}^{4}c{m}^{-1}$
• D. $1.724\times {10}^{4}c{m}^{-1}$

Answer 1

The correct option is D $1.724\times {10}^{4}c{m}^{-1}$

Wavelength of yellow Radiation $\lambda =5800\mathring{A}$

wave number $=\frac{1}{\lambda }$

$=\frac{1}{5800}\times {10}^{-8}c{m}^{-1}$

$\overline{v}=1.724\times {10}^{4}c{m}^{-1}$