Question

The frequency of yellow light having wavelength 600 nm is

• A. $5.0\times {10}^{14}Hz$
• B. $2.5\times {10}^{7}Hz$
• C. $5.0\times {10}^{7}Hz$
• D. $2.5\times {10}^{14}Hz$

Answer 1

The correct option is A

$5.0\times {10}^{14}Hz$

We know, in vacuum, all electromagnetic radiations travel at the speed of light.
$c=\nu \lambda$

$\nu =\frac{c}{\lambda }=\frac{3\times {10}^{8}m/s}{600\times {10}^{-9}m}=5.0\times {10}^{14}Hz$