Which describes pulsed wave emission?

Which describes pulsed wave emission?

• A. The signal is continuous with no breaks.
• B. The signal turns on and off in a very rapid sequence.
• C. The signal is intermittent; the on/off sequence is rapid.
• D. The signal is randomly modulated with varying amplitude.

Answer: (C)

Pulsed wave emission means energy is sent out in short bursts, with brief gaps of no emission between them. The best way to describe that is that the signal is intermittent, with an on/off sequence that’s rapid. That conveys both the quick pulses and the silent intervals that define pulsing. A continuous signal has no gaps, so it isn’t pulsed. Random amplitude modulation describes changes in strength over time rather than distinct on/off bursts, so it isn’t the same concept as pulsing. Describing the on/off as a very rapid sequence also points to short, repeated pulses, but the term “intermittent” makes the presence of gaps explicit.

Pulsed wave emission means energy is sent out in short bursts, with brief gaps of no emission between them. The best way to describe that is that the signal is intermittent, with an on/off sequence that’s rapid. That conveys both the quick pulses and the silent intervals that define pulsing. A continuous signal has no gaps, so it isn’t pulsed. Random amplitude modulation describes changes in strength over time rather than distinct on/off bursts, so it isn’t the same concept as pulsing. Describing the on/off as a very rapid sequence also points to short, repeated pulses, but the term “intermittent” makes the presence of gaps explicit.