00:00Welcome to Physics for Information Science.
00:03Today, we'll explore how physical principles shape the technology we use every day.
00:08In information science, physics helps us understand how signals move,
00:12whether as waves, particles, or even digital pulses.
00:16In information science, data can behave like waves,
00:19carrying energy through oscillations that define how signals move and interact.
00:24Electromagnetic fields carry information invisible around us.
00:27Understanding these waves is key to how Wi-Fi, Bluetooth, and radio transmit data.
00:32In circuits, voltage and current define digital bits.
00:36These tiny physical signals are the foundation of all computing.
00:40Semiconductors, like silicon, control the flow of electrons and holes,
00:44forming the physical basis of modern computing circuits.
00:48Transistors act as tiny switches, controlling electron flow.
00:52Billions of them together power everything from CPUs to smartphones.
00:56Memory stores information physically, using capacitors, floating gates, or magnetic domains.
01:01Every bit is a tiny, tangible state in the hardware.
01:04Computing generates heat, because every bit operation consumer energy.
01:08Understanding thermodynamics helps us manage heat and optimize performance.
01:12Waves carry information through variations in amplitude, frequency, and phase.
01:17Bandwidth limits how much data can flow at once.
01:20Quantum physics introduces qubits, where information exists in superposition.
01:25This unlocks new possibilities beyond classical computing.
01:28In quantum systems, noise and decoherence can corrupt information.
01:32Error correction ensures data remains accurate and reliable.
01:36GPS relies on relativity.
01:38Satellites experience time differently than Earth clocks,
01:41and these corrections are essential for accurate positioning.
01:44Modern computing faces physical limits.
01:47Moore's law slows as transistors reach nanoscale, prompting new technologies like Spintronic.
01:52Memory stores information physically, using capacitors, floating gates, or magnetic domains.
01:57Every bit is a tiny, tangible state in the hardware.
02:00Computing generates heat, because every bit operation consumer energy.
02:03Understanding thermodynamics helps us manage heat and optimize performance.
02:08Waves carry information through variations in amplitude, frequency, and phase.
02:13Bandwidth limits how much data can flow at once.
02:16Quantum physics introduces qubits, where information exists in superposition.
02:20This unlocks new possibilities beyond classical computing.
02:24In quantum systems, noise and decoherence can corrupt information.
02:28Error correction ensures data remains accurate and reliable.
02:32GPS relies on relativity.
02:34Satellites experience time differently than Earth clocks,
02:37and these corrections are essential for accurate positioning.
02:40Modern computing faces physical limits.
02:43Moore's law slows as transistors reach nanoscale, prompting new technologies like Spintronic.
02:48Modern computing-
02:51Modern computing.
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