photographic plate
Definition
Noun: A photographic plate is a flat sheet, historically made of glass or metal, coated with a light-sensitive emulsion. It is used to capture and store a photographic image through exposure to light and subsequent chemical processing.
Usage
The term photographic plate refers specifically to the physical medium used in early and some scientific photography. It is a direct object in sentences describing its use or characteristics.
Examples
- Early astronomers relied on the photographic plate to record images of stars and galaxies.
- The museum's collection includes a photographic plate from the 19th century.
- Before film, photographers had to carefully handle each heavy glass photographic plate.
Advanced Usage
- In scientific contexts: The term is still used in specific fields like historical astronomy or archival science to refer to the original physical records.
- The data from the century-old photographic plate was digitized for modern analysis.
Variants and Related Words
- Plate (noun): A common shortened form used in technical and historical contexts (e.g., "a glass plate," "develop the plate").
- Dry plate (noun): A type of photographic plate with a gelatin emulsion, which replaced the earlier "wet plate" process.
- Photographic film (noun): The flexible plastic successor to the rigid photographic plate.
Synonyms
- Photographic sheet
- Light-sensitive plate
Related Terms
- Emulsion (noun): The coating of light-sensitive chemicals on the plate.
- Development (noun): The chemical process to make the latent image on an exposed plate visible.
Noun
-
a flat sheet of metal or glass on which a photographic image can be recorded
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