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Aspect Ratio

This term is used to describe an image on a TV or movie theater screen, and is defined as the width of the image divided by the height. In the case of a standard TV with a full-screen image, it is 4:3 or 1.33:1 (once the mathematical division is calculated). Movie theater images are usually 1.85:1 or 2.35:1, sometimes called “widescreen” or “letterbox.” When the widescreen images are shown on a regular TV in their original aspect ratio, they leave a blank area at the top and bottom of the screen.

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