How radar actually works: transmitting pulses, echo timing and range, the Doppler shift for velocity, phased-array beam steering, and why stealth shapes matter.
How superconductors actually work: Cooper pairs, the BCS mechanism, the Meissner effect and flux pinning behind quantum levitation, and why room-temperature superconductivity is so hard.
Quantum error correction explained: why qubits decohere, how surface codes detect errors with stabilizers, the threshold theorem, logical qubits, and the road to fault-tolerant quantum computing.
How MRI actually works: nuclear magnetic resonance, the main magnet and gradients, RF pulses, T1 and T2 relaxation, and how a spatial image is reconstructed.
How noise-cancelling headphones work: the physics of destructive interference, feedforward vs feedback ANC, why it beats bass best, and adaptive ANC in 2026.
How LiDAR actually works, from first principles: time-of-flight vs FMCW, the laser and detector chain, point clouds, solid-state designs, and LiDAR vs radar.
How silicon photonics chips move data with light: waveguides, modulators, and why optics is reshaping AI data centers, explained from first principles.
How waves actually work — the physics of waves explained from first principles: types, properties, the wave equation, interference, and real-world examples.