Who invented the arc lamp?

Who invented the arc lamp?

• A. Thomas Edison
• B. Nikola Tesla
• C. Humphrey Davy in 1802-1809
• D. Sir Isaac Newton

Answer: (C)

The concept being tested is who first demonstrated light produced by an electric arc between carbon electrodes. Humphry Davy pioneered this idea in the early 1800s, showing that passing a strong electric current between two carbon rods creates a bright, continuous arc that emits intense light. His experiments around 1802 (with further work into 1807–1809) established the arc lamp as a form of electric lighting, separate from later developments. While Edison is famous for the practical incandescent lamp and lighting systems, and Tesla for broader electrical innovations, the arc lamp itself originates with Davy. Isaac Newton predates electricity and is not connected to arc lighting.

The concept being tested is who first demonstrated light produced by an electric arc between carbon electrodes. Humphry Davy pioneered this idea in the early 1800s, showing that passing a strong electric current between two carbon rods creates a bright, continuous arc that emits intense light. His experiments around 1802 (with further work into 1807–1809) established the arc lamp as a form of electric lighting, separate from later developments. While Edison is famous for the practical incandescent lamp and lighting systems, and Tesla for broader electrical innovations, the arc lamp itself originates with Davy. Isaac Newton predates electricity and is not connected to arc lighting.