Which two methods are used to develop silver nitrate images?

The correct answer is rooted in the way silver nitrate reacts to light and the chemical processes involved in developing images. Silver nitrate is a light-sensitive compound that, upon exposure to UV light or visible light, undergoes a photochemical reaction that leads to the formation of metallic silver. This process essentially "develops" the latent image on a surface where the silver nitrate has been applied.

In conjunction with light exposure, a chemical development process plays a crucial role in enhancing the contrast and visibility of the image formed. This could involve the use of various reducing agents that convert the exposed silver ions into metallic silver, thus making the images more pronounced.

The combination of these two methods—light exposure that initiates the reaction and the chemical process that develops and reveals the image—makes them fundamental to silver nitrate image development. Understanding this synergistic approach is critical in the field of latent print analysis, as it showcases how both light and chemicals are integral to producing a visible print.