Final answer:
Rain hitting the radome can disrupt the radar scan by scattering the radar waves and causing interference.
Step-by-step explanation:
When rain hits the radome, it can disrupt the radar scan. Raindrops can scatter the radar waves, causing interference and reducing the accuracy of the radar system. This happens because raindrops are larger than the wavelength of the radar waves, causing reflection and diffraction of the waves, which can interfere with the radar signals.