What is contrast ratio?

What is contrast ratio?

• A. The number of shades between the whitest white and blackest black a screen can display
• B. The brightness of the screen in nits
• C. The speed of screen refresh
• D. The color accuracy range

Answer: (A)

Contrast ratio measures how much brighter the brightest white on a display is compared with its darkest black. It’s found by dividing the luminance of white by the luminance of black. A higher ratio means a bigger gap between light and dark, so you can see more detail in shadows and more distinct grayscale tones overall. For example, if white is 1000 cd/m^2 and black is 1 cd/m^2, the ratio is 1000:1. This describes the range of shades you can perceive between the lightest and darkest parts of the image. Other metrics measure different things: brightness in nits is the overall light output, refresh rate is how often the image updates per second, and color gamut/accuracy describes which colors can be shown. So the concept described by the question is the range of shades between the lightest white and darkest black.

Contrast ratio measures how much brighter the brightest white on a display is compared with its darkest black. It’s found by dividing the luminance of white by the luminance of black. A higher ratio means a bigger gap between light and dark, so you can see more detail in shadows and more distinct grayscale tones overall. For example, if white is 1000 cd/m^2 and black is 1 cd/m^2, the ratio is 1000:1. This describes the range of shades you can perceive between the lightest and darkest parts of the image. Other metrics measure different things: brightness in nits is the overall light output, refresh rate is how often the image updates per second, and color gamut/accuracy describes which colors can be shown. So the concept described by the question is the range of shades between the lightest white and darkest black.