The Energy Density of an Electromagnetic Wave in Free Space

question 52

Multiple Choice

The energy density of an electromagnetic wave in free space is

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

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