The frequency of an electromagnetic radiation is $2 \times 10^6 \ Hz$. What is its wavelength in metres? (Velocity of light $= 3 \times 10^8 \ m \ s^{-1}$)
- A$6.0 \times 10^{14}$
- B$1.5 \times 10^4$
- C$1.5 \times 10^2$
- D$0.66 \times 10^{-2}$
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