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To get the width and height of a screen, find out what the viewable diagonal is. On plasma screens and projection TV's, it is the same as the screen size. On regular TV's, it is a pair of inches smaller since the size specifies the diagonal of the entire faceplate of the tube and not just the phosphor.
Using Pythagoras theorem, we find that
the width of a 4:3 screen is 80% of the diagonal, the height 60%
the width of a 16:9 screen is roughly 87% of the diagonal, the height roughly 49%
This makes a 32" widescreen smaller in height than a regular 28" screen. The 32" widescreen has a diagonal of 760mm, making it 662mm wide and 373mm high; the 28" regular screen has a diagonal of 670mm, making it 536mm wide and 402mm high. In other words, even one size bigger the widescren is about 3cm lower than the regular screen. However, you gain more than 12cm in width.
So, in order to get a similar height on a widescreen set as a regular set, you need to step up at least one screen size or even two. Remember that once you reach the plasma and projection sets, you get an additional 5cm 'for free' to the diagonal than on a tube relative to screen size, because of the different way of measure.
Last edited by Zacabeb; 01-02-2002 at 4:16 PM.
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