In particular, the photon model accounted for the frequency dependence of light's energy, and explained the ability of matter and radiation to be in thermal equilibrium.he energy of a system that emits a photon is decreased by the energy of the photon as measured in the rest frame of the emitting system, which may result in a reduction in mass in the amount. Similarly, the mass of a system that absorbs a photon is increased by a corresponding amount.
Responding to the changes, the Finnish company started churning out both sophisticated multimedia handsets as well as low-end devices. The year 2001 saw the company launching the Nokia 7650, its first phone to feature a built-in camera. It was also the first to sport a full color display.
Smartphones, especially Android and Windows Phone devices, have been growing rapidly in size over the past few years, from devices with mere 4-inch displays to those with screens almost six inches in size. Today Nokia is announcing its largest devices yet. The new Lumia 1520 (along with its low-end counterpart, the Lumia 1320) features a massive 6-inch display, making it the largest Windows Phone ever released. The 1520 is also the first Windows Phone with a 1080p screen and Qualcomm's Snapdragon 800 processor.