What is the wavelength λλlambda of the wave described in the problem introduction? Express the wavelength in terms of the other given variables and constants

Complete Question

The complete question is shown on the first uploaded image

The wavelength is  

Explanation:

From the question we are told that  

      The electric field is

       The magnetic field is  

From the above equation

and  k is the wave number which is mathematically represented as

=>    

Where is the wavelength

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