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Timothy coxon
18,406 PointsPixel Ratios Multi Choice Question
I just failed this test as I answered 4 as the number of css pixels display when the pixel ratio is 2. The correct answer according to the quiz is apparently 2. Surely if you double the pixel dimensions you are increasing the number of both horizontal and vertical pixels displayed? 1px * 1px = 1px total displayed 2px * 2px = 4px total displayed
2 Answers
Tom Bedford
15,645 PointsIf you mean the question:
"If a device has a pixel-ratio of 2, then 1 CSS pixel is displayed as __ physical pixel(s) on screen."
I believe the correct answer is 2 as with CSS you are either specifying a width or height, not the area taken up by both.
e.g. on an iPhone 4+ with a width of 640px and a pixel ratio of 2, to target the full width you would use 320px.
So, one CSS pixel (in this case width) is displayed as 2 on the iPhone.
Timothy coxon
18,406 PointsYeah kinda makes sense when you put it like that but the original question doesn't really mention anything along those lines. In the way it's the question is written out if you are looking at 1 css pixel on a 2 pixel ratio device you are actually seeing 4 physical pixels and not 2. I think I am just arguing semantics really but the question could be a little clearer on that front ;)