Which of the following detects visible light?

The eye is the primary organ responsible for detecting visible light, enabling humans and many other organisms to see. The human eye contains photoreceptors known as rods and cones, which are sensitive to different wavelengths of light in the visible spectrum. Rods are more sensitive to lower light levels, while cones are responsible for color vision and function best in bright light.

In contrast, photographic film reacts chemically to light, capturing images but does not actively detect light in the way the eye does. A Geiger counter detects ionizing radiation, such as alpha and beta particles, as well as gamma rays, but does not respond to visible light. An infrared sensor is designed to detect infrared radiation, which is not within the visible spectrum of light that the eye perceives.

Thus, your eye is uniquely equipped to perceive and interpret light as part of the visual process, making it the correct choice for detecting visible light.