Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
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Blurry Photos Show Logic Board for Next-Generation iPhone with Shielding Removed
Chinese site Sina.com now shares [Google translation] a new set of photos showing components allegedly from the next-generation iPhone, including a pair of photos showing the logic board with the shielding removed. Unfortunately, the blurry nature of the photos and the apparently incomplete stage of assembly for the part continue to limit the amount of information that can be determined.
The report claims that the original source has said that the next-generation iPhone will use the A5X system-on-a-chip found in the third-generation iPad, although that conclusion does not appear to be directly drawn from the logic board photos. Other sources have been unclear on what chip Apple will use in the new iPhone given that it does not necessarily need the full graphics capabilities of the latest iPad and will almost certainly require that RAM be included within the package rather than separately as seen with the A5X in the iPad.