🔍 Key Concepts

• Half-wavelength antenna behavior and how it radiates energy • Difference between electromagnetic fields and electrostatic fields around an antenna • Near field vs. far field regions around a transmitting antenna

💭 Think About

• Think about what kind of energy a transmitting antenna is designed to send out into space for radio communication. • Consider what kind of fields exist very close to the antenna versus what dominates farther away from the antenna. • Ask yourself whether an antenna that is being fed RF power can have only one type of field present, or if multiple related fields must exist together.

✅ Before You Answer

• Review the definition of an electromagnetic wave (what two components does it have?). • Recall what happens to electric and magnetic fields when an antenna is resonant at 1/2 wavelength. • Check which answer choices use correct technical terms that are actually used in antenna theory, and be cautious of options that sound vague or non-standard (like "electro-flux").