Nikola Tesla was a prolific inventor and visionary whose contributions laid the groundwork for many modern technologies. Here are some of his most notable inventions and discoveries:

1. Alternating Current (AC) System: Tesla developed the AC electrical system, which includes the AC motor and transformer, making long-distance electrical transmission feasible.

2. Tesla Coil: An electrical resonant transformer circuit that produces high-voltage, low-current, high-frequency alternating current electricity. It is used in radio technology and various applications in physics.

3. Induction Motor: A type of electric motor that runs on alternating current and uses electromagnetic induction to produce mechanical energy.

4. Radio Technology: Tesla conducted early experiments with radio waves and is often credited with the invention of radio. He demonstrated the transmission of radio frequency energy in 1893.

5. Wireless Transmission of Energy: Tesla envisioned a system for transmitting electricity without wires, exemplified by his work on the Wardenclyffe Tower.

6. Remote Control: Tesla demonstrated the first remote-controlled boat in 1898, showcasing the potential for wireless control of devices.

7. X-ray Imaging: Tesla conducted experiments with high-voltage and high-frequency currents, contributing to the early understanding of X-rays.

8. Neon Lighting: He contributed to the development of neon lights and other gas-discharge lamps.

9. Tesla Turbine: A bladeless turbine that uses smooth disks instead of traditional blades to convert fluid energy into mechanical energy.

10. Tesla Valve: A one-way valve designed to allow fluid to flow in one direction without moving parts.

11. Polyphase System: Tesla’s work on polyphase systems allowed for more efficient generation and distribution of electricity.

12. Radiant Energy: He explored the concept of harnessing energy from the environment, including cosmic rays and other forms of radiation.

13. Earthquake Machine: Tesla created a mechanical oscillator that he claimed could induce seismic activity, though this was more a curiosity than a practical invention.

14. Tesla Oscillator: A device used to generate high-frequency alternating currents.

15. Wireless Communication: Beyond radio, Tesla envisioned a global communication system using wireless technology.

While many of Tesla’s ideas were groundbreaking, not all were fully realized or commercially successful during his lifetime. His legacy continues to influence modern science and technology.