Question

Discuss how exposure time affects the density of duplicating film.

Option 1: Increased exposure time leads to higher film density.
Option 2: Decreased exposure time results in higher film density.
Option 3: Exposure time has no effect on duplicating film density.
Option 4: Longer exposure time causes lower film density.

Answer 1

Increased exposure time allows more light or radiation to interact with the film's emulsion, resulting in greater chemical changes and therefore a higher film density, making it darker.

Step-by-step explanation:

When discussing how exposure time affects the density of duplicating film, it's essential to understand how photographic film works. As film is exposed to radiation such as light or ionizing radiation, a chemical change occurs in the film's emulsion. The more radiation the film is subjected to, the more it gets exposed, leading to a higher density or a darker appearance on the film. Thus, under typical conditions, Option 1: Increased exposure time leads to higher film density is correct. This is because increased exposure time allows more light or radiation to interact with the film, increasing the probability of chemical changes in the emulsion, resulting in greater film darkening.