What part of a camera functions in a similar way to the retina of the eye?

Step 1: Analyze the question The question asks which camera part does the same job as the retina of the eye.

Step 2: Explain the concept The eye and the camera work in a similar way:

| Eye part | Function | Camera equivalent | |---|---|---| | Cornea and lens | Refract (bend) light to form an image | Lens | | Iris and pupil | Control how much light enters | Diaphragm (aperture) | | Eyelid | Blocks or allows light briefly | Shutter | | Ciliary muscles | Change the lens shape to focus | Focusing ring | | Retina | Screen where the real, inverted image is formed and detected | Film (or the digital sensor) |

Step 3: Solution

• The retina is the light-sensitive screen at the back of the eye. The image is formed on it, and it records or detects that image before the optic nerve sends the signal to the brain.
• In a camera, the surface where the image is formed and recorded is the film (in modern digital cameras, the image sensor).
• The other options do different jobs: • Diaphragm controls the amount of light, like the iris. • Focusing ring adjusts the lens position, like the ciliary muscles. • Lens focuses light, like the eye lens. • Shutter controls the exposure time, like the eyelid.

Step 4: Answer The film functions like the retina, so the correct option is B.

Step 5: Exam tip Remember the rule "Retina = Film = Screen". Whatever part receives the image is the retina's equivalent. Likewise, "Iris = Diaphragm" is a common pairing in NECO and JAMB questions.