Solution:
Formula for finding wavelength from frequency is wavelength=wave velocity(c)/frequency(f).
General value of Wave velocity (c) = 3 x 10^8 m/s
Given frequency = 2.0 x 10^6 Hz
Now,
Wavelength = 3 x 10^8 m/s / 2.0 x 10^6 Hz
= 150 m
Therefore the value of wavelength is 150m.