Amplitude of a magnetic field of an electromagnetic wave

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To find the amplitude of the magnetic field of an electromagnetic wave with an intensity of 80 MW/m^2, the relevant equations involve the relationship between intensity, electric field amplitude, and magnetic field amplitude. The intensity can be expressed as I = (1/2) * ε₀ * c * E₀², where E₀ is the electric field amplitude. The magnetic field amplitude B₀ can be derived from the electric field amplitude using the equation B₀ = E₀/c. The discussion highlights the need for correct calculations and the application of relevant equations to solve for the magnetic field amplitude. Accurate calculations are essential for determining the correct amplitude values in electromagnetic wave analysis.
swankymotor16
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If the intensity of an electromagnetic wave is 80 MW/m^2, what is the amplitude of the magnetic field of this wave? (c = 3.0 x 10^8 m/s, permeability of free space ''miu subzero''= 4π × 10^-7 T ∙ m/A, permittivity of free space ''E subzero'' = 8.85 × 10^-12 C^2/N ∙ m^2)

80MW/m^2= 80,000,000 W/m^2

(80x10^6)(4pi x10^-7)/ 8.85x10^-12 = 1.132x10^13 ?
 
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Your calculation is not correct. Why did you set it up that way? What equations have you learned that are relevant to this problem?
 
If I use E0 = √2N(√μ0/ε0) this whould be the value of Electrical amplitude, but I don't know how to relate this to the magnetic amplitude.Could anyone else give this a go?
 
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