Question

Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this light? 2.2 × 10–15 HZ 2.0 × 102 HZ 3.0 × 108 HZ 4.6 × 1014 HZ

Answer 1

D

Step-by-step explanation:

Got it right on edge 2021

Answer 2

`4.6\cdot 10^(14) Hz`

Step-by-step explanation:

The frequency of an electromagnetic wave is given by:

`f=(c)/(\lambda)`

where

`c=3.0\cdot 10^8 m/s` is the speed of light

`\lambda` is the wavelength

Red light has a wavelength of

`\lambda=6.5\cdot 10^(-7) m`

So by using the formula above we can calculate its frequency:

`f=(3.0\cdot 10^8 m/s)/(6.5\cdot 10^(-7) m)=4.6\cdot 10^(14) Hz`