Physics-
General
Easy

Question

In an electromagnetic wave, the amplitude of electric field is 1V/m. The frequency of wave is 5 cross times 10 to the power of 14 end exponentHz The wave is propagating along z-axis. The average energy density of electric field, in Joule /m3, will be

  1. 1.1 cross times 10 to the power of negative 11 end exponent    
  2. 2.2 cross times 10 to the power of negative 12 end exponent    
  3. 3.3 cross times 10 to the power of negative 13 end exponent    
  4. 4.4 cross times 10 to the power of negative 14 end exponent    

The correct answer is: 2.2 cross times 10 to the power of negative 12 end exponent

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