Answer:

The smallest dot that can be displayed on a screen is called a pixel.

Pixels are the smallest units of information that make up an image or display. They are tiny, square-shaped elements that combine to form the images we see on digital screens such as computer monitors, smartphones, televisions, and other electronic devices. Each pixel can emit light or color, and together, they create the visual representation of digital content.

Explanation:

1. Definition of a Pixel:
A pixel is a contraction of the term "picture element." It is the smallest addressable element in a digital image or display. Pixels are arranged in a grid-like pattern, and each pixel contains information about its color and brightness. When viewed from a distance, these pixels blend together to create a seamless and continuous image.

2. Pixel Resolution:
The resolution of a display refers to the total number of pixels available on the screen. It is usually expressed in terms of width and height, such as 1920x1080 or 1280x720. The higher the resolution, the more pixels there are, resulting in a clearer and more detailed image.

3. Size of a Pixel:
The size of a pixel varies depending on the display device and its pixel density. Pixel density is often measured in pixels per inch (PPI) or dots per inch (DPI). Higher pixel density means smaller pixels and a higher level of detail. For example, a smartphone with a high-resolution display may have smaller pixels compared to a larger television screen with a lower resolution.

4. Pixel's Role in Displaying Images:
Pixels are responsible for rendering images, videos, and text on a screen. Each pixel can emit different colors, usually represented by red, green, and blue (RGB) values. By combining different intensities of these three primary colors, a wide range of other colors can be created.

Conclusion:
In summary, pixels are the building blocks of digital images and displays. They are responsible for creating the visual content we see on screens by emitting light or color. The resolution of a display determines the number of pixels available, and the size of a pixel affects the level of detail in the displayed image.