To solve this problem it is necessary to apply the concepts related to Wavelength depending on the frequency and speed of light.
The equation that meets these parameters is given by
[tex]\lambda = \frac{c}{f}[/tex]
Where,
c = Speed of light
[tex]\lambda = Wavelength[/tex]
f = Frequency
Our values are given as
[tex]c = 3*10^8m/s \rightarrow[/tex] velocity of light in free space
f = 2Hz
Replacing we have that
[tex]\lambda = \frac{c}{f}\\\lambda = \frac{3*10^8}{2}\\\lambda = 1.5*10^8m[/tex]
Therefore the correct answer is B.
