Answer:
666.7 Hz
Explanation:
Light is an example of electromagnetic wave. Electromagnetic waves consist of oscillations of electric and magnetic fields that propagate through space. They are transverse waves, and they all travel through a vacuum at a speed of
[tex]c=3.0\cdot 10^8 m/s[/tex]
called speed of light.
The relationship between frequency and wavelenght for an electromagnetic wave is given by the equation:
[tex]c=f\lambda[/tex]
where
f is the frequency of the wave
[tex]\lambda[/tex] is its wavelength
In this problem, the light wave has a wavelength of
[tex]\lambda=4.5\cdot 10^5 m[/tex]
Therefore, by using the equation above, we can find its frequency:
[tex]f=\frac{c}{\lambda}=\frac{3.0\cdot 10^8}{4.5\cdot 10^5}=666.7 Hz[/tex]
