The electric field of an electromagnetic wave in free space is given by Ē == cos(10^7t=kx)V/m where t is time in s and x is position in m. Choose the correct statement
1.The wavelength is 100 m
2.The value of kis 0.33 rad/m
3.The amplitude of electric field is 5underroot 2 V/m
4.The wave is propagating along -x direction
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