In terms of RADAR function, what could a longer pulse width negatively affect?

A longer pulse width negatively affects range resolution because it increases the duration of the transmitted signal. Range resolution is the ability to distinguish between two closely spaced objects in distance. When the pulse width is longer, it means that the received echo will contain information from both objects over a longer time period, which can cause the detection system to struggle in distinguishing between them. This can lead to a blurring effect where two separate targets appear as one, thereby reducing the clarity of the measurement regarding their individual distances.

In contrast, shorter pulse widths enhance range resolution, allowing for better separation of closely spaced objects since they produce echo returns that are more distinct.