The Apple iPad is one of the most popular varieties of tablet computer. A tablet is a lightweight device that is often used for viewing multimedia, browsing the Internet, or using applications. Apple has upgraded the iPad several times since its launch in 2010.
The iPad 2 was unveiled in 2011, and is thinner and more powerful than the original. In 2012, the third-generation iPod was released. This version includes several new upgrades, including a superior screen and a better processor.
Size and Display
Apple’s third generation of the iPad includes a display that has been upgraded from the previous version. Dubbed the “Retina,” this screen uses backlit LED technology. It has a diagonal size of 9.7 inches (24 centimeters), and a resolution of 2048 by 1536 pixels.
The iPad’s display density is 264 pixels per inch (PPI). Multitouch technology allows the display to detect multiple fingers on the screen at once. Overall, the Apple iPad is 9.50 inches (241.2 millimeters) tall, and 7.31 (185.7 millimeters) wide. It has a thickness of 0.37 inches (9.4 millimeters). The device weighs 1.44 pounds (652 grams). Both black-and-white and colored versions of the case are available.
Battery and Wireless
An internal lithium-ion rechargeable battery is standard on the iPad. This provides 42.5 watts of power, which can keep the device running for up to 10 hours of active use. The battery can be charged using a power adapter or a USB connection to a nearby computer.
Both a Wi-Fi and a cellular version of the iPad are available. The former can connect to the Internet using a local wireless connection, while the latter can connect to local and 3G cell networks. Apple iPads are compatible with cellular data service from AT&T, Sprint, and Verizon.
A Bluetooth radio is also included on the iPad. This allows the user to connect with nearby electronic devices, such as cell phones or headsets. The fourth-generation Bluetooth protocol is supported, which offers better data transfer speeds than previous wireless protocols.
Processor and Memory
Apple iPads use a dual-core A6X processor. The third generation of iPad includes upgraded quad-core graphics capabilities. This means that the ability to render video and other graphic elements is superior to the previous iPad versions.
All third-generation iPads contain one gigabyte of random access memory (RAM). However, consumers can choose from three sizes of internal storage. Models with 64GB, 32GB, and 16GB of storage are available. Regardless of the capacity, all iPads use solid-state nonvolatile memory instead of hard drives with moving parts.
Camera and Multimedia
Two cameras are included on the iPad. The first is a screen-facing camera, which can be used for “FaceTime” videoconferencing. This camera has a resolution of 1.2 megapixels for still photos, and 720p for digital video.
A second camera faces away from the screen, and has a still resolution of 5 megapixels. This camera can record video in full high-definition 1080p resolution. Both cameras can detect faces, and allow the user to quickly tag photos.
These sensors provide location details and photo adjustment information to the device. A built-in speaker and microphone are both standard on the iPad. An audio jack allows sound to play through a headset or an external speaker.
The iPad can stream video to a Apple TV unit, or can send video with an optional VGA adapter. All iPads include a digital compass, accelerometer, and ambient light sensor.
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