The frequency of the electromagnetic wave is 1.5×[tex]10^{9}[/tex]Hz
"The waves which are formed by the superposition of electric oscillations and magnetic oscillations, is called electromagnetic wave."
The oscillation must be on the mutually perpendicular planes.
"Frequency describes the number of waves that pass a fixed place in a given amount of time."
Speed of light c=3×[tex]10^{8}[/tex]m/s
Wavelength λ=20cm=0.2m
Frequency ν=?
ν=c/λ
ν=3×[tex]10^{8}[/tex]/0.2=1.5×[tex]10^{9}[/tex]Hz
Hence, the frequency of electromagnetic wave is 1.5 ×[tex]10^{9}[/tex]
https://brainly.com/question/12142302
#SPJ2
