What is a pixel in web design?

In graphic, web design, and user interfaces, a "pixel" may refer to a fixed length rather than a true pixel on the screen to accommodate different pixel densities. A typical definition, such as in CSS, is that a "physical" pixel is 1⁄96 inch (0.26 mm).

What is another word for pixel?

This list is not exhaustive and, depending on context, synonyms include pel, sample, byte, bit, dot, and spot. Pixels can be used as a unit of measure such as: 2400 pixels per inch, 640 pixels per line, or spaced 10 pixels apart.

What is a physical pixel?

A typical definition, such as in CSS, is that a "physical" pixel is 1⁄96 inch (0.26 mm). Doing so makes sure a given element will display as the same size no matter what screen resolution views it.

What is pixel scale in astronomy?

The pixel scale used in astronomy is the angular distance between two objects on the sky that fall one pixel apart on the detector (CCD or infrared chip). The scale s measured in radians is the ratio of the pixel spacing p and focal length f of the preceding optics, s = p / f.