Persistence of vision is used in Cinematography works because the human eye and brain can only process 10 to 12 separate images per second and subsequent image replaces it in this period of time it will create the illusion of continuity. The use of this techniques to create moving images predates conventional cinema.

Cinematography makes use of Persistence of Vision
Explanation:
Cinematography is the art and technique of capturing moving images on film or digital media. It involves various elements such as lighting, composition, camera movement, and visual effects. One of the key concepts used in cinematography is the persistence of vision.
What is Persistence of Vision?
Persistence of vision is the phenomenon where an image continues to be retained by the human eye for a brief moment after the actual image has disappeared. This is due to the brain's ability to retain visual information for a short period of time.
How is Persistence of Vision used in Cinematography?
Cinematographers take advantage of the persistence of vision to create the illusion of motion in films. They do this by capturing a series of still images, known as frames, and projecting them at a rapid speed. The brain then combines these individual frames into a continuous sequence, creating the perception of motion.
Benefits of using Persistence of Vision in Cinematography:
1. Smooth Motion: The use of persistence of vision helps to create smooth and fluid motion in films, making the viewing experience more realistic and engaging.
2. Frame Rate Control: Cinematographers can control the frame rate at which the images are projected to achieve different effects. A higher frame rate can create slow-motion sequences, while a lower frame rate can create fast-paced action.
3. Special Effects: Persistence of vision allows cinematographers to incorporate various special effects, such as freeze frames, time-lapse, and motion blur, to enhance the storytelling and visual appeal of the film.
4. Immersion: By utilizing the persistence of vision, cinematographers can immerse the audience in the narrative and transport them into the world of the film.
In conclusion, cinematography makes use of the persistence of vision to create the illusion of motion and enhance the visual storytelling in films. It is an essential technique that contributes to the overall cinematic experience.

Understanding Cinematography and Persistence of Vision
Cinematography is the art of capturing moving images on film or digitally. One of the foundational concepts that underpin this art form is the phenomenon known as "persistence of vision." Here’s why option 'B' is the correct answer:
What is Persistence of Vision?
- Persistence of vision refers to the optical illusion whereby multiple discrete images blend into a single image in the human mind.
- This occurs because the eye retains an image for a fraction of a second after it has been removed from view.
How It Relates to Cinematography
- In cinematography, a series of still images (frames) are captured at a high speed, typically 24 frames per second in traditional film.
- Due to persistence of vision, when these still images are played back rapidly, they appear to the viewer as smooth, continuous motion.
Other Options Explained
- Accommodation: This refers to the eye's ability to focus on near and far objects. While important for viewing, it does not directly relate to how moving images are perceived.
- Least Distance of Distinct Vision: This term relates to the closest distance at which the eye can focus on an object clearly. It does not apply to the continuous motion effect in cinematography.
- Bi-focal Lens System: This system aids in vision but is irrelevant to the mechanics of film projection and the perception of motion.
Conclusion
In summary, persistence of vision is crucial for cinematography as it enables the viewer to perceive rapid sequences of images as fluid motion, making it the correct answer to the question.