Upon impact, a small amount of elastic energy is converted into acoustic energy — that resounding indication of breaking glass. But the majority of the elastic energy stored in the glass will be converted into two — or more — new surface energies. A crack. Or several cracks. With one eye closed, you’ll reach down gingerly, reluctant to turn it over. There won't be any shards to pick up off the pavement, only a phone with a freshly splintered screen, the jagged lines and spiderwebs forming some kind of painful abstract art.
You've just smashed your phone's screen.
Your phone is in fact covered with some very hard, very strong glass that's only 0.8 mm thick. Yet it takes 30 times more force to scratch the iPhone screen than it does a piece of plastic, according to Apple. And under perfect conditions, the latest chemically tempered Corning Gorilla Glass — which is more likely than not covering the front of the new phone in your pocket — can withstand around 100,000 pounds of pressure per square inch. Or in English, a 1.18-pound iron ball dropped from six feet. Sourced from Gizmodo and Buzzfeed. For complete descriptions of how iphone glass cracks search for the Buzzfeed article, "How Your Phone's Screen Shatters."
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