Which component is a circular disk that rotates with each frame?

Which component is a circular disk that rotates with each frame?

• A. Gate
• B. Shutter
• C. Film Loop
• D. Pressure Plate

Answer: (B)

A rotating circular disk that controls the exposure of each frame is the shutter. In many film and motion-camera systems, the shutter is a circular disk with a window or opening. As the disk spins, that opening aligns with the light path for a brief moment, exposing the film to light for the duration of a single frame. After the exposure, the disk continues to rotate and covers the film, preventing extra light from affecting the frame. This timing mechanism is what produces consistent frame-by-frame exposure. The other parts mentioned have different roles: the gate is the opening where the film sits and is exposed, the film loop is the length of film that travels through the system, and the pressure plate keeps the film flat against the gate.

A rotating circular disk that controls the exposure of each frame is the shutter. In many film and motion-camera systems, the shutter is a circular disk with a window or opening. As the disk spins, that opening aligns with the light path for a brief moment, exposing the film to light for the duration of a single frame. After the exposure, the disk continues to rotate and covers the film, preventing extra light from affecting the frame. This timing mechanism is what produces consistent frame-by-frame exposure.

The other parts mentioned have different roles: the gate is the opening where the film sits and is exposed, the film loop is the length of film that travels through the system, and the pressure plate keeps the film flat against the gate.