Answer:
Phosphorescence or afterglow is a property of intensifying screens that:
c. Tends to increase image blur.
Explanation:
1. Intensifying screens are used in radiography to amplify the effect of radiation on the film, reducing the exposure time required.
2. Phosphorescence refers to the emission of light by a material after it has been exposed to radiation.
3. When intensifying screens exhibit phosphorescence or afterglow, it can result in prolonged emission of light even after the radiation exposure has ended.
4. This afterglow can contribute to image blur because the continued emission of light can lead to smearing or spreading of the image on the film.
5. Therefore, phosphorescence or afterglow tends to increase image blur.
In summary, the correct answer is c. Tends to increase image blur.
