Question 26

The Correct Answer is B **Explanation for Option B (4):** The trailing edge of a wave, in the context of typical wave analysis (like a square wave, pulse, or wavefront in optics/electronics), is the part of the wave that transitions back to its initial state or baseline after reaching its peak or maximum amplitude. In the provided illustration (Figure "B", which typically depicts a square or pulsed wave), Line 4 represents the falling edge—the point where the voltage or amplitude rapidly drops back down to the zero or baseline level. This falling edge is synonymous with the trailing edge of the wave pulse. **Explanation for Incorrect Options:** * **A) 3:** Line 3 represents the **leading edge** (or rising edge) of the wave, where the amplitude rapidly transitions from the baseline to the peak level. * **C) 5:** Line 5 represents the baseline or the minimum amplitude (often zero volts) that exists **after** the pulse has passed. * **D) 6:** Line 6 represents the high-level plateau or the maximum amplitude (the pulse width) between the leading and trailing edges.