X-ray film emulsion is more sensitive under which of the following conditions?

The sensitivity of X-ray film emulsion is greatly impacted by exposure conditions. After exposure, the emulsion has undergone a chemical change, and it is more effectively able to capture the image during subsequent processing. This is because the latent image formed during exposure becomes more pronounced after the film has been developed, leading to greater visibility of the radiographic details.

Before exposure, the emulsion is unaltered and does not yet have the ability to capture radiation effectively, while low temperatures can impair the chemical reactions necessary for proper developing, potentially reducing sensitivity. Likewise, low humidity can cause issues with film handling and processing, which could affect the final output. Thus, the correct understanding of film sensitivity recognizes that it is heightened after exposure and during the development phase.