An electromagnetic wave with maximum electric field $E_{max}$ and maximum magnetic field $B_{max}$ strikes a surface. Which expression represents the radiation pressure on the surf... An electromagnetic wave with maximum electric field $E_{max}$ and maximum magnetic field $B_{max}$ strikes a surface. Which expression represents the radiation pressure on the surface, assuming complete absorption and where $\mu_o$ is the permeability of free space and $c$ is the speed of light?
Understand the Problem
The question asks for the radiation pressure of an electromagnetic wave on a surface, assuming complete absorption. This involves relating the maximum electric and magnetic fields to the pressure, using permeability and the speed of light. We need to identify the correct formula that relates these quantities.
Answer
The radiation pressure is $E_{max}B_{max}/(2\mu_o)$
The radiation pressure on the surface, assuming complete absorption, is given by $E_{max}B_{max}/(2\mu_o)$
Answer for screen readers
The radiation pressure on the surface, assuming complete absorption, is given by $E_{max}B_{max}/(2\mu_o)$
More Information
In the context of electromagnetic waves, radiation pressure is the pressure exerted upon any surface exposed to electromagnetic radiation. If the radiation is completely absorbed, the radiation pressure is given by the energy density of the electromagnetic wave.
Tips
Ensure you use the correct formula for radiation pressure based on whether the surface completely absorbs or reflects the radiation.
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