What cells in the eye that detect black and white?

The cells in the eye that are primarily responsible for detecting black and white are called rods and cones. Rods are more sensitive to dim light and are responsible for peripheral and night vision, while cones are responsible for colour vision and fine details in bright light. These cells are located in the retina, the light-sensitive layer at the back of the eye.

Here are some key points about rods and cones:

- Rods:

- More numerous in the retina, especially in the peripheral areas

- More sensitive to low levels of light

- Do not provide detailed visual information

- Do not distinguish colours

- More active in dim light and nighttime conditions

- Cones:

- Less numerous in the retina, concentrated in the central area (macula)

- Require brighter light conditions to function

- Provide detailed visual information

- Responsible for colour vision

- More active in daylight or well-lit environments

Within the retina, there are three types of cones, which are specialized in detecting different ranges of colours:

- Short-wavelength-sensitive cones (S-cones): Sensitive to blue light

- Medium-wavelength-sensitive cones (M-cones): Sensitive to green light

- Long-wavelength-sensitive cones (L-cones): Sensitive to red light

These cones work in combination to sense the full spectrum of visible colours. The combined signals from rods and cones are processed in the brain, providing us with the visual information we perceive, including the ability to see black, white, and various colours.