01 / The world before
Ordinary light sources lacked the same coherence and precision.
02 / The discovery
Quantum research enabled lasers and masers.
03 / The people
Townes, Basov, Prokhorov and many developers.
04 / The obstacles
Different applications required distinct engineering and safeguards.
05 / The world after
Precise light found uses in measurement, communication and medicine.
06 / Why it still matters
Laser tools are common in industry and laboratories.