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.
A year before the iPhone was revealed, the LG PRADA boasted the first capacitive touchscreen. Samsung and Nokia also had touch-based mobile phones in the works but were not released. Nokia chose not to, due to risk of cost. Samsung, to this day, is still battling with Apple over who truly was first.. This boom in the touchscreen market spread past phones and onto other devices, like gaming consoles or tablets. The late 2000s saw a race among tech competitors to make the best tablet.