Respuesta :
Answer:
[tex]B = 3.28 \times 10^{-7} T[/tex]
[tex]u_{density} = 4.3 \times 10^{-8} J/m^3[/tex]
[tex]Intensity = 12.88 W/m^2[/tex]
Explanation:
As we know that the electric field strength in vacuum due to electromagnetic waves is given as
[tex]E = 98.5 V/m[/tex]
now we know the relation between electric field and magnetic field as
[tex]B = \frac{E}{c}[/tex]
[tex]B = \frac{98.5}{3\times 10^8}[/tex]
[tex]B = 3.28 \times 10^{-7} T[/tex]
For energy density we know that
[tex]u_{density} = \frac{1}{2}\epsilon_0 E^2[/tex]
[tex]u_{density} = \frac{1}{2}(8.85 \times 10^{-12})(98.5)^2[/tex]
[tex]u_{density} = 4.3 \times 10^{-8} J/m^3[/tex]
Power flow per unit area is given as
[tex]Intensity = energy density \times speed[/tex]
[tex]Intensity = (4.3 \times 10^{-8})(3\times 10^8)[/tex]
[tex]Intensity = 12.88 W/m^2[/tex]
