The Energy Density of an Electromagnetic Wave in Free Space

question 61

Multiple Choice

The energy density of an electromagnetic wave in free space is

• A)entirely in the electric field.
• B)entirely in the magnetic field.
• C)1/4 in the electric field and 3/4 in the magnetic field.
• D)1/4 in the magnetic field and 3/4 in the electric field.
• E)equally divided between the magnetic and the electric fields.

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