Computational problems, Yes, the Solution of computational problems, that can never be solved in a feasible time period by the existing supercomputers is the basic need of a Quantum computer. Quantum Computers use quantum-mechanical phenomena like Superposition and Entanglement to perform computation. Superposition refers to the presence of a quantum particle like an atom or a photon in two states simultaneously, exactly it is not simultaneous but it spins so quickly that it appears to be in both positions at the same time. Entanglement is a physical phenomenon in which a group of quantum particles, interact, share spatial proximity in such a way that their quantum states remain dependent on one other even if they get separated by larger distance. Such particles show wave-like properties, and when frequency and waveform of these particles become identical, they are said to be in Coherence. Coherence is a mandatory condition to perform computing. In a Quantum System, Superposi...
Cell phones are basically full-duplex radio transmitters and receivers , that are capable of transmitting and receiving radio signals using an antenna . Full duplex means both the sender and recipient can talk at the same time but at different frequencies. A cell phone uses two frequencies per call, one for speaking and one listening. Digital Cell phone Radio waves occupy the range of 30 Hz to 300 GHz with wavelengths of 10000 km to 1 mm respectively in the electromagnetic spectrum. Why Radio waves are used in communication? Radio waves are transmitted easily through the air. They don't cause damage to the human body. These waves can be easily reflected to change their direction. How cell phones work? Your phone converts the radio waves into electrical signals and then into voice, similarly, voice is converted into electrical signals and then into radio waves . Cell phones operate within the cells . Each cell has a hexagonal shape . A typical cell occupies an area of 26 s...