Question

Which one of the following frequencies of radiation (in Hz) has a wavelength of $600nm$?

• A. $2.0\times {10}^{13}$
• B. $5.0\times {10}^{16}$
• C. $2.0\times {10}^{14}$
• D. $5.0\times {10}^{14}$

Answer 1

The correct option is D $5.0\times {10}^{14}$

The relationship between the frequency $v$, the speed of light c and the wavelength $\lambda$ is, $v=\frac{c}{\lambda }$.

Substitute values in the above expression

$v=\frac{3\times {10}^8}{600\times {10}^{-9}}=5\times {10}^{14}Hz$