Question

The frequency of yellow light with wavelength 600 nm is:

• A. 5.0 x 10¹⁴ Hz
• B. 2.5 x 10⁷ Hz
• C. 5.0 x 10⁷ Hz
• D. 2.5 x 10¹⁴ Hz

Answer 1

The correct option is A

5.0 x 10¹⁴ Hz

We know, in vacuum, all electromagnetic radiations travel at the speed of light.
$c=v\lambda$
$v=\frac{c}{\lambda }=\frac{3\times {10}^{8}m/s}{600\times {10}^{-9}m}=5.0\times {10}^{14}Hz$