What timeframe allows films to be exposed to white light without causing errors?

Films that have been developed need to undergo a specific process to ensure they remain free from light exposure errors. The critical factor here is the fixing stage, which is a step in the development process that removes unexposed silver halide crystals from the film. Once the film has been fixed, it can be safely exposed to white light after a particular duration.

In this case, exposing the film to white light after 2 to 3 minutes of fixing allows sufficient time for the fixing agent to work effectively. This ensures that the film has been adequately processed to remove any light-sensitive materials, meaning that it is less likely to be adversely affected by subsequent exposure to white light. This timeframe allows the film to stabilize before being handled in environments where white light is present.

The other choices do not provide sufficient security against light exposure issues: films immediately after development without fixing are still sensitive to light; exposure after 1 to 2 minutes may be insufficient as it does not allow complete fixing; and handling only under safe light conditions might not be practical in all scenarios. Thus, the option that specifies waiting after the fixing process aligns with the proper film handling protocols in radiographic practice.