The intensity \( I \) and electric field amplitude \( E_0 \) of an electromagnetic wave are defined by: \[ I = \frac{1}{2} \epsilon_0 c E_0^2 \] In this equation, \( \epsilon_0 = 8.854 \times 10^{-12} \, \text{C}^2/\text{N} \cdot \text{m}^2 \) is the permittivity of free space, and \( c = 3 \times 10^8 \, \text{m/s} \) is the speed of light. Thus, \( E_0 \) can be calculated as: \[ E_0 = \sqrt{\frac{2I}{\epsilon_0 c}} = \sqrt{\frac{2 \times 2.0}{8.854 \times 10^{-12} \times 3 \times 10^8}} \approx 388.8 \, \text{N/C}. \]
| LIST I | LIST II |
|---|---|
| A. Maxwell's First Equation | I. Modified Ampere's Law |
| B. Maxwell's Second Equation | II. Faraday's Laws of Electromagnetic Induction |
| C. Maxwell's Third Equation | III. Gauss Law in Electrostatics |
| D. Maxwell's Fourth Equation | IV. Gauss Law in Magnetostatics |