which is used in motion picture films

Options

A. cellulose acetate
B. glucose acetate
C. starch acetate
D. sucrose acetate

Answer

**Step-by-Step Solution:**

1. **Understanding Motion Picture Films**: Motion picture films are composed of several layers, primarily a clear plastic base and a light-sensitive layer.

2. **Components of Motion Picture Films**:
- **Clear Plastic Base**: This serves as the foundation of the film.
- **Gelatin Layer**: A thin layer of gelatin is coated on the plastic base. This layer is crucial as it holds the light-sensitive materials.

3. **Light-Sensitive Material**: The gelatin layer contains light-sensitive compounds that can be either colored or black and white. The primary component in this layer is silver, which forms very small particles that react to light, creating the image.

4. **Historical Context**: In the 1950s, a specific type of film base was introduced for safety reasons. This was known as cellulose acetate, which replaced the more flammable nitrate film base that was used earlier.

5. **Conclusion**: Therefore, the material used in motion picture films, especially noted for safety in the 1950s, is cellulose acetate.

**Final Answer**: Cellulose acetate is used in motion picture films.

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