Final answer:
The latent effect 'lag' when using a vidicon TV camera can average out statistical fluctuations, providing an advantage by reducing quantum mottle and leading to smoother images.
Step-by-step explanation:
A latent effect "lag" when using a vidicon TV camera can actually be an advantage because it can average out the statistical fluctuations. This latent effect can help in reducing the effects of what's known as quantum mottle, which is created by the random nature of photons hitting the detector. The lag allows for a smoother image as it averages the incoming photons over a period of time, providing a more consistent and less noisy image.