JEE Main 201911 Jan, Evening shiftPhysicsMediumElectromagnetic Waves120× since 2002
A 27 mW laser beam has a cross-sectional area of 10 mm². The magnitude of the maximum electric field in this electromagnetic wave is given by :
[Given permittivity of space ₀ = 9 10^–12 SI units, Speed of light c = 3 10⁸ m/s]