Aspect ratio is an image projection attribute that describes the proportional relationship between the width of an image and its height.
The two most common aspect ratios are 4:3, also known as fullscreen, and 16:9, also known as widescreen.
Formula to calculate aspect ratio.
If the width of a mirror is 1m and its height is 2m. What is the mirror’s aspect ratio.
Therefore, the aspect ratio of the mirror is 1:2.