Which statement describes long pulses?

Which statement describes long pulses?

• A. Many cycles in the pulse
• B. Fewer cycles in the pulse
• C. Shorter wavelengths
• D. Longer listening time

Answer: (A)

Long pulses are bursts that contain many cycles of the wave. A pulse is a finite stretch of oscillations, so the longer the burst lasts, the more cycles it includes. If you keep the frequency of the wave the same, extending the pulse duration naturally adds more cycles, making the pulse long in the sense of having many cycles. Fewer cycles describe a short pulse, since there are fewer oscillations packed into the burst. Shorter wavelengths aren’t what define a long pulse—the wavelength depends on frequency and the medium, not on how many cycles fit into the pulse. Longer listening time isn’t a descriptor of the pulse itself.

Long pulses are bursts that contain many cycles of the wave. A pulse is a finite stretch of oscillations, so the longer the burst lasts, the more cycles it includes. If you keep the frequency of the wave the same, extending the pulse duration naturally adds more cycles, making the pulse long in the sense of having many cycles.

Fewer cycles describe a short pulse, since there are fewer oscillations packed into the burst. Shorter wavelengths aren’t what define a long pulse—the wavelength depends on frequency and the medium, not on how many cycles fit into the pulse. Longer listening time isn’t a descriptor of the pulse itself.