Which option best defines a continuous wave emitter?

• A. Pulsed emission.
• B. Intermittent emission.
• C. Discrete bursts.
• D. Continuous emission.

Answer: (D)

A continuous wave emitter is defined by emitting energy without interruptions over time. The signal stays present continuously, even if its amplitude is modulated, rather than turning on and off. This is different from pulsed emission, which delivers energy in short bursts with defined on and off periods; intermittent emission, which has irregular gaps, and discrete bursts, which are separate, isolated pulses. So the option that describes energy being emitted without gaps best captures what a continuous wave emitter is.