Question

an electromagnetic wave in a vacuum has a wavelength of 0.07m what is its frequency?

Answer 1

Does this have options?

Answer 2

f = 4.3 • 109 Hz

Answer 3

4.3 x 10 ^9 Hz

Answer 4

Every electromagnetic wave has the speed of light.
The formula to use is \[v=f \lambda\] and \[f=\frac{ v }{ \lambda }\]
\[f=\frac{ 3*10^8 }{ 0.07 }=4.29*10^9\]

Answer 5

Yea