What does free space mean in electromagnetic wave propagation?

• A region where no electromagnetic waves exist

• A medium where radio waves travel without interference

• A place where radio waves get absorbed

• A space where electromagnetic waves travel in only one direction

Who proposed the fundamental theory of electromagnetic waves?

• Heinrich Hertz

• James Clerk Maxwell

• Albert Einstein

• Nikola Tesla

What is an isotropic source in electromagnetic theory?

• A source that emits radiation in one direction only

• A theoretical source that radiates equally in all directions

• A type of antenna used in mobile networks

• A source that emits only magnetic waves

What happens when electromagnetic waves undergo reflection?

• They pass through the medium with no change

• They completely disappear

• The angle of incidence equals the angle of reflection

• They slow down as they enter a new medium

Which of the following is a necessary condition for wave interference?

• Only one wave must be present

• The waves must originate from different sources

• There must be at least two waves traveling different paths

• The waves must have different frequencies

Which of the following is NOT a mode of wave propagation?

• Ground waves

• Sky waves

• Plasma waves

• Space waves

The ionosphere primarily affects which type of wave propagation?

• Space wave propagation

• Microwave propagation

• Sky wave propagation

• Ground wave propagation

What is the critical frequency (fc) in wave propagation?

• The maximum frequency that can be transmitted without loss

• The minimum frequency required for satellite communication

• The highest frequency at which radio waves are reflected by the ionosphere

• The frequency at which waves completely penetrate the Earth's surface

________ refers to the emission and propagation of energy through space in the form of electromagnetic waves.

Answer explanation

electromagnetic radiation

The theoretical concept of a source that radiates energy uniformly in all directions is called a/an ________ source.

Answer explanation

isotropic