| Technology | Underlying physics | |------------|---------------------| | Transistor (1947) | Semiconductor band theory | | Laser (1960) | Stimulated emission | | CCD sensor (1969) | Photoelectric effect | | MRI (1970s) | Nuclear magnetic resonance | | LED (1960s, blue in 1990s) | Semiconductor junctions | | GPS (1970s) | Special relativity (time dilation) | | Atomic clock | Quantum transitions | | Smartphone accelerometer | MEMS + piezoelectric effect |
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